diff --git a/src/WorkFlowCheck.API/Controllers/SyncController.cs b/src/WorkFlowCheck.API/Controllers/SyncController.cs
index d06d663..c23e5bb 100644
--- a/src/WorkFlowCheck.API/Controllers/SyncController.cs
+++ b/src/WorkFlowCheck.API/Controllers/SyncController.cs
@@ -293,7 +293,27 @@ namespace WorkFlowCheck.API.Controllers
             return retVal;
         }
 
+        [HttpPost("UpdateCheckListHeader")]
+        public async Task<ApiResponseDTO<CheckListHeaderDTO>> UpdateCheckListHeader([FromBody] CheckListHeaderDTO checkListHeaderDTO)
+        {
+            var retVal = new ApiResponseDTO<CheckListHeaderDTO>()
+            {
+                IsSuccess = true
+            };
 
+            try
+            {
+                var result = await _syncService.UpdateCheckListHeaderAsync(checkListHeaderDTO);
+                retVal.Data = result;
+
+            }
+            catch (Exception ex)
+            {
+                retVal.IsSuccess = false;
+                Log.Error(ex.Message);
+            }
+            return retVal;
+        }
 
 
 
diff --git a/src/WorkFlowCheck.BL/Services/Interfaces/ISyncService.cs b/src/WorkFlowCheck.BL/Services/Interfaces/ISyncService.cs
index 3485c09..4a63bce 100644
--- a/src/WorkFlowCheck.BL/Services/Interfaces/ISyncService.cs
+++ b/src/WorkFlowCheck.BL/Services/Interfaces/ISyncService.cs
@@ -23,5 +23,7 @@ namespace WorkFlowCheck.BL.Services.Interfaces
 
         Task<List<CheckListTemplateHeaderDTO>> GetAllCheckListTemplateAsync(int userId);
         Task<List<CheckListHeaderDTO>> GetAllCheckListAsync(int userId);
+
+        Task<CheckListHeaderDTO> UpdateCheckListHeaderAsync(CheckListHeaderDTO checkListHeaderDTO);
     }
 }
diff --git a/src/WorkFlowCheck.BL/Services/SyncService.cs b/src/WorkFlowCheck.BL/Services/SyncService.cs
index 6dd7832..7cc0c49 100644
--- a/src/WorkFlowCheck.BL/Services/SyncService.cs
+++ b/src/WorkFlowCheck.BL/Services/SyncService.cs
@@ -340,5 +340,55 @@ namespace WorkFlowCheck.BL.Services
             return retVal;
         }
 
+        public async Task<CheckListHeaderDTO> UpdateCheckListHeaderAsync(CheckListHeaderDTO checkListHeaderDTO)
+        {
+            var retVal = new CheckListHeaderDTO();
+
+            try
+            {
+                if (checkListHeaderDTO.Id == 0) //Hozzáadás, ha Id == 0
+                {
+
+                }
+                else
+                {
+                    var res = await _dbContext.CheckListHeaders
+                                              .Include(i => i.CheckListRows)
+                                              .Where(w => w.Id == checkListHeaderDTO.Id)
+                                              .FirstOrDefaultAsync();
+                    if (res != null)
+                    {
+                        var ids = checkListHeaderDTO.CheckListRowDTO?.Select(r => r.Id).ToList();
+                        if (ids != null && ids.Count > 0)
+                        {
+                            var rowsToUpdate = await _dbContext.CheckListRows
+                                                    .Where(r => ids.Contains(r.Id))
+                                                    .ToListAsync();
+                            foreach (var row in rowsToUpdate)
+                            {
+                                var dtoRow = checkListHeaderDTO.CheckListRowDTO?.FirstOrDefault(r => r.Id == row.Id);
+                                if (dtoRow != null)
+                                {
+                                    row.Answer = dtoRow.Answer;
+                                    if (dtoRow.Photo != null && dtoRow.Photo.Length > 0)
+                                    {
+                                        row.Photo = dtoRow.Photo;
+                                    }
+                                }
+                            }
+                        }
+                        await _dbContext.SaveChangesAsync();
+
+                        retVal = _mapper.Map<CheckListHeaderDTO>(res);
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                Log.Error(ex.Message);
+            }
+
+            return retVal;
+        }
     }
 }