diff --git a/src/main/java/com/interplug/qcast/util/ExcelUtil.java b/src/main/java/com/interplug/qcast/util/ExcelUtil.java
index 44925563..007fa6b4 100644
--- a/src/main/java/com/interplug/qcast/util/ExcelUtil.java
+++ b/src/main/java/com/interplug/qcast/util/ExcelUtil.java
@@ -9,6 +9,8 @@ import java.beans.PropertyDescriptor;
 import java.io.*;
 import java.lang.reflect.Field;
 import java.lang.reflect.Method;
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
 import java.text.DecimalFormat;
 import java.util.*;
 import lombok.RequiredArgsConstructor;
@@ -104,7 +106,8 @@ public class ExcelUtil {
 
       InputStream is = new BufferedInputStream(templateStream);
 
-      response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + ".xlsx\"");
+      String encodedFileName = URLEncoder.encode(fileName, StandardCharsets.UTF_8).replaceAll("\\+", "%20");
+      response.setHeader("Content-Disposition", "attachment; filename=\"" + encodedFileName + ".xlsx\"");
       response.addHeader("Access-Control-Expose-Headers", "Content-Disposition");
 
       try (OutputStream os = response.getOutputStream()) {
diff --git a/src/main/java/com/interplug/qcast/util/PdfUtil.java b/src/main/java/com/interplug/qcast/util/PdfUtil.java
index 2420dfd0..b1a01f7b 100644
--- a/src/main/java/com/interplug/qcast/util/PdfUtil.java
+++ b/src/main/java/com/interplug/qcast/util/PdfUtil.java
@@ -11,6 +11,7 @@ import com.itextpdf.kernel.utils.PdfMerger;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
 import java.io.*;
+import java.net.URLEncoder;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import lombok.RequiredArgsConstructor;
@@ -81,7 +82,8 @@ public class PdfUtil {
 
     // 응답에 PDF 설정
     response.setContentType("application/pdf");
-    response.setHeader("Content-Disposition", "attachment; filename=\"" + pdfFileName + "\".pdf");
+    String encodedFileName = URLEncoder.encode(pdfFileName, StandardCharsets.UTF_8).replaceAll("\\+", "%20");
+    response.setHeader("Content-Disposition", "attachment; filename=\"" + encodedFileName + "\".pdf");
     response.addHeader("Access-Control-Expose-Headers", "Content-Disposition");
 
     try (java.io.OutputStream os = response.getOutputStream();
@@ -185,7 +187,8 @@ public class PdfUtil {
 
     // 응답에 PDF 설정
     response.setContentType("application/pdf");
-    response.setHeader("Content-Disposition", "attachment; filename=\"" + pdfFileName + "\".pdf");
+    String encodedFileName = URLEncoder.encode(pdfFileName, StandardCharsets.UTF_8).replaceAll("\\+", "%20");
+    response.setHeader("Content-Disposition", "attachment; filename=\"" + encodedFileName + "\".pdf");
     response.addHeader("Access-Control-Expose-Headers", "Content-Disposition");
 
     try (OutputStream os = response.getOutputStream();