diff --git a/src/main/java/org/example/wowelang_backend/report/service/ReportMailService.java b/src/main/java/org/example/wowelang_backend/report/service/ReportMailService.java
index e8c7ee8..8e86dba 100644
--- a/src/main/java/org/example/wowelang_backend/report/service/ReportMailService.java
+++ b/src/main/java/org/example/wowelang_backend/report/service/ReportMailService.java
@@ -1,9 +1,11 @@
 package org.example.wowelang_backend.report.service;
 
+import jakarta.mail.MessagingException;
+import jakarta.mail.internet.MimeMessage;
 import lombok.RequiredArgsConstructor;
 import org.example.wowelang_backend.report.domain.Report;
-import org.springframework.mail.SimpleMailMessage;
 import org.springframework.mail.javamail.JavaMailSender;
+import org.springframework.mail.javamail.MimeMessageHelper;
 import org.springframework.stereotype.Service;
 
 @Service
@@ -13,28 +15,51 @@ public class ReportMailService {
     private final JavaMailSender mailSender;
 
     public void sendReportNotification(Report report) {
-        SimpleMailMessage message = new SimpleMailMessage();
-        message.setTo("wowelang0216@gmail.com"); // 받을 이메일
-        message.setSubject("[신고 접수] 새로운 신고가 접수되었습니다.");
-        message.setText(buildContent(report));
+        try {
+            MimeMessage message = mailSender.createMimeMessage();
+            MimeMessageHelper helper = new MimeMessageHelper(message, false, "UTF-8");
 
-        mailSender.send(message);
+            helper.setTo("wowelang0216@gmail.com");
+            helper.setSubject("[신고 접수] 새로운 신고가 접수되었습니다.");
+            helper.setText(buildHtmlContent(report), true); // true → HTML 모드
+
+            mailSender.send(message);
+        } catch (MessagingException e) {
+            throw new RuntimeException("신고 메일 전송 실패", e);
+        }
     }
 
-    private String buildContent(Report report) {
-        return String.format(
-                """
-                신고자: %s
-                피신고자: %s
-                신고 사유: %s
-                상세 내용: %s
-                신고 발원지: %s
+    private String buildHtmlContent(Report report) {
+        return String.format("""
+                <div style="font-family: Arial, sans-serif; line-height: 1.6;">
+                    <h2 style="color: #d9534f;">🚨 신고 접수 알림</h2>
+                    <p><strong>신고자:</strong> %s</p>
+                    <p><strong>피신고자:</strong> %s</p>
+                    <p><strong>신고 사유:</strong> %s</p>
+                    <p><strong>상세 내용:</strong></p>
+                    <div style="background: #f8f9fa; padding: 10px; border-radius: 4px; border: 1px solid #ddd;">
+                        %s
+                    </div>
+                    <p><strong>신고 발원지:</strong> %s</p>
+                    <hr>
+                    <p style="font-size: 12px; color: #888;">WowELang 관리자 시스템에서 자동 발송된 메일입니다.</p>
+                </div>
                 """,
-                report.getReportingUser().getName(),
-                report.getReportedUser().getName(),
-                report.getReportCategory().getReportCategoryName(),
-                report.getReportReason(),
-                report.getReportTarget()
+            report.getReportingUser().getName(),
+            report.getReportedUser().getName(),
+            report.getReportCategory().getReportCategoryName(),
+            escapeHtml(report.getReportReason()),
+            report.getReportTarget()
         );
     }
-}
+
+    // HTML 이스케이프 유틸 (간단 버전)
+    private String escapeHtml(String input) {
+        if (input == null) return "";
+        return input.replace("&", "&amp;")
+            .replace("<", "&lt;")
+            .replace(">", "&gt;")
+            .replace("\"", "&quot;")
+            .replace("'", "&#39;");
+    }
+}
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