diff --git a/jspblog/src/main/java/com/example/jspblog/domain/reply/ReplyDao.java b/jspblog/src/main/java/com/example/jspblog/domain/reply/ReplyDao.java
index 83a1b848..6952e517 100644
--- a/jspblog/src/main/java/com/example/jspblog/domain/reply/ReplyDao.java
+++ b/jspblog/src/main/java/com/example/jspblog/domain/reply/ReplyDao.java
@@ -1,4 +1,31 @@
 package com.example.jspblog.domain.reply;
 
+import com.example.jspblog.config.DB;
+import com.example.jspblog.domain.reply.dto.SaveReqDto;
+
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+
 public class ReplyDao {
+    public int save(SaveReqDto dto) {
+        String sql = "insert into reply(userId, boardId, content, createDate) values(?, ?, ?, now())";
+        Connection conn = DB.getConnection();
+        PreparedStatement pstmt = null;
+
+        if (conn != null) {
+            try {
+                pstmt = conn.prepareStatement(sql);
+                pstmt.setInt(1, dto.getUserId());
+                pstmt.setInt(2, dto.getBoardId());
+                pstmt.setString(3, dto.getContent());
+                int result = pstmt.executeUpdate();
+                return result;
+            } catch (Exception e) {
+                e.printStackTrace();
+            } finally {
+                DB.close(conn, pstmt);
+            }
+        }
+        return -1;
+    }
 }
diff --git a/jspblog/src/main/java/com/example/jspblog/domain/reply/dto/SaveReqDto.java b/jspblog/src/main/java/com/example/jspblog/domain/reply/dto/SaveReqDto.java
new file mode 100644
index 00000000..2a3fa75c
--- /dev/null
+++ b/jspblog/src/main/java/com/example/jspblog/domain/reply/dto/SaveReqDto.java
@@ -0,0 +1,13 @@
+package com.example.jspblog.domain.reply.dto;
+
+import lombok.Builder;
+import lombok.Data;
+
+@Data
+@Builder
+public class SaveReqDto {
+
+    private int userId;
+    private int boardId;
+    private String content;
+}
diff --git a/jspblog/src/main/java/com/example/jspblog/service/ReplyService.java b/jspblog/src/main/java/com/example/jspblog/service/ReplyService.java
index 56d10aae..5c2c3cf8 100644
--- a/jspblog/src/main/java/com/example/jspblog/service/ReplyService.java
+++ b/jspblog/src/main/java/com/example/jspblog/service/ReplyService.java
@@ -1,4 +1,17 @@
 package com.example.jspblog.service;
 
+import com.example.jspblog.domain.reply.ReplyDao;
+import com.example.jspblog.domain.reply.dto.SaveReqDto;
+
 public class ReplyService {
+
+    private final ReplyDao replyDao;
+
+    public ReplyService() {
+        this.replyDao = new ReplyDao();
+    }
+
+    public int 댓글쓰기(SaveReqDto dto) {
+        return replyDao.save(dto);
+    }
 }
diff --git a/jspblog/src/main/java/com/example/jspblog/web/ReplyController.java b/jspblog/src/main/java/com/example/jspblog/web/ReplyController.java
index 65114a02..50f73fc9 100644
--- a/jspblog/src/main/java/com/example/jspblog/web/ReplyController.java
+++ b/jspblog/src/main/java/com/example/jspblog/web/ReplyController.java
@@ -1,13 +1,19 @@
 package com.example.jspblog.web;
 
+import com.example.jspblog.domain.reply.dto.SaveReqDto;
+import com.example.jspblog.service.BoardService;
+import com.example.jspblog.service.ReplyService;
+import com.example.jspblog.util.Script;
+
 import javax.servlet.ServletException;
 import javax.servlet.annotation.WebServlet;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.HttpSession;
 import java.io.IOException;
 
-@WebServlet(name = "reply")
+@WebServlet("/reply")
 public class ReplyController extends HttpServlet {
     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
         doProcess(request, response);
@@ -19,11 +25,29 @@ public class ReplyController extends HttpServlet {
 
     protected void doProcess(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
         String cmd = request.getParameter("cmd");
+        ReplyService replyService = new ReplyService();
+        HttpSession session = request.getSession();
 
-        if(cmd.equals("loginForm")) {
+        switch (cmd) {
+            case "save": {
+                int userId = Integer.parseInt(request.getParameter("userId"));
+                int boardId = Integer.parseInt(request.getParameter("boardId"));
+                String content = request.getParameter("content");
 
-        } else if (cmd.equals("login")) {
+                SaveReqDto dto = SaveReqDto.builder()
+                        .userId(userId)
+                        .boardId(boardId)
+                        .content(content)
+                        .build();
 
+                int result = replyService.댓글쓰기(dto);
+                if (result == 1) {
+                    response.sendRedirect("/jspblog/board?cmd=detail&id=" + boardId);
+                } else {
+                    Script.back(response, "댓글쓰기 실패");
+                }
+                break;
+            }
         }
     }
 }
diff --git a/jspblog/src/main/webapp/board/detail.jsp b/jspblog/src/main/webapp/board/detail.jsp
index 13d5313c..fb99e03c 100644
--- a/jspblog/src/main/webapp/board/detail.jsp
+++ b/jspblog/src/main/webapp/board/detail.jsp
@@ -31,9 +31,13 @@
                 <div class="panel panel-info">
                     <div class="panel-heading m-2"><b>Comment</b></div>
                     <div class="panel-body">
-                        <textarea id="reply__write__form" class="form-control" placeholder="write a comment..." rows="2"></textarea>
-                        <br>
-                        <button onclick="" class="btn btn-primary pull-right">댓글쓰기</button>
+                        <form action="${pageContext.request.contextPath}/reply?cmd=save" method="post">
+                            <input type="hidden" name="userId" value="${sessionScope.principal.id}">
+                            <input type="hidden" name="boardId" value="${detail.id}">
+                            <textarea id="reply__write__form" name="content" class="form-control" placeholder="write a comment..." rows="2"></textarea>
+                            <br>
+                            <button class="btn btn-primary pull-right">댓글쓰기</button>
+                        </form>
                         <div class="clearfix"></div>
                         <hr />