diff --git a/src/main/java/geoinfo/regi/projectList/ProjectListController.java b/src/main/java/geoinfo/regi/projectList/ProjectListController.java
index 666f15bc..40c2d4f2 100644
--- a/src/main/java/geoinfo/regi/projectList/ProjectListController.java
+++ b/src/main/java/geoinfo/regi/projectList/ProjectListController.java
@@ -112,7 +112,7 @@ public class ProjectListController {
 			os.write(jsonObject.toString().getBytes("UTF-8")); // UTF-8 인코딩하여 출력
 		}
 		
-		return null; // @ResponseBody이므로 반환 값은 필요 없습니다.
+		return null;
 	}
 
 	// 지반정보등록
diff --git a/src/main/webapp/WEB-INF/views/drilling/input/drilling_input.jsp b/src/main/webapp/WEB-INF/views/drilling/input/drilling_input.jsp
index 217a0ccf..99006af8 100644
--- a/src/main/webapp/WEB-INF/views/drilling/input/drilling_input.jsp
+++ b/src/main/webapp/WEB-INF/views/drilling/input/drilling_input.jsp
@@ -232,7 +232,7 @@ if (request.getSession().getAttribute("CLS") == null || "2".equals(request.getSe
                         <tr>
                             <th>사업명</th>
                             <td colspan="3">
-                                <input type="text" value="" onfocusout="duplicateCheckProjectName(this)" class="input-box" id="const-name-` + tableId + `" placeholder="사업명">
+                                <input type="text" value="" onfocusout="duplicateCheckProjectNameLocal(this)" class="input-box" id="const-name-` + tableId + `" placeholder="사업명">
                             </td>
                         </tr>
                         <tr>
@@ -360,7 +360,7 @@ if (request.getSession().getAttribute("CLS") == null || "2".equals(request.getSe
 	    	for (var i = 0; i < tableDataElements.length; i++) {
 
 	    		let duplChkEle = tableDataElements[i].querySelector('.input-box[id*="const-name"]')		// 엑셀양식 로드시 사업명 중복 체크해야 하는 대상 엘리먼트
- 				let result = projNmDuplChkResult(duplChkEle)
+ 				let result = projNmDuplChkResult(duplChkEle, getProjectCodeForDuplicateCheck())
 				if (result.result == 'false') {
 					duplChkEle.focus();
 					shakeAndHighlight(duplChkEle, result.msg)
@@ -649,7 +649,6 @@ if (request.getSession().getAttribute("CLS") == null || "2".equals(request.getSe
 		// 사업명
 		var constNameEle = document.getElementById('const-name-' + (index));
 		if (constNameEle) {
-			//duplicateCheckProjectName(constNameEle);
 			if( constNameEle.value === "" ) {
 				shakeAndHighlight(constNameEle, "사업명을 입력하세요." );
 				return false;
@@ -899,7 +898,7 @@ if (request.getSession().getAttribute("CLS") == null || "2".equals(request.getSe
                 	<tr>
                     	<th>사업명</th>
                         <td colspan="3">
-	                        <input type="text" value="`+ const_name +`" onfocusout="duplicateCheckProjectName(this)" class="input-box" id="const-name-` + tableId + `" placeholder="사업명">
+	                        <input type="text" value="`+ const_name +`" onfocusout="duplicateCheckProjectNameLocal(this)" class="input-box" id="const-name-` + tableId + `" placeholder="사업명">
 	                    </td>
                     </tr>
                     <tr>
@@ -956,6 +955,19 @@ if (request.getSession().getAttribute("CLS") == null || "2".equals(request.getSe
 	function removeRow(idx) {
 		$('div[data-index='+ idx +']').remove();
 	}
+	
+	function duplicateCheckProjectNameLocal(projectNameInput) {
+		duplicateCheckProjectName( projectNameInput, getProjectCodeForDuplicateCheck() );
+	}
+	
+	//특정 프로젝트와 연결되어 있는지 확인하여 projectCode를 넣는다.
+	function getProjectCodeForDuplicateCheck() {
+		if( orgConstUsr ) {
+			return orgPrjCd;
+		}
+		return null;
+	}
+	
 </script>
 <!-- javascript end-->