diff --git a/PyroFetes/Endpoints/PurchaseOrder/PatchPurchaseOrderPurchaseConditionsEndpoint.cs b/PyroFetes/Endpoints/PurchaseOrder/PatchPurchaseOrderPurchaseConditionsEndpoint.cs
new file mode 100644
index 0000000..1339f45
--- /dev/null
+++ b/PyroFetes/Endpoints/PurchaseOrder/PatchPurchaseOrderPurchaseConditionsEndpoint.cs
@@ -0,0 +1,54 @@
+using FastEndpoints;
+using Microsoft.EntityFrameworkCore;
+using PyroFetes.DTO.PurchaseOrder.Request;
+using PyroFetes.DTO.PurchaseOrder.Response;
+using PyroFetes.DTO.PurchaseProduct.Request;
+using PyroFetes.DTO.PurchaseProduct.Response;
+
+namespace PyroFetes.Endpoints.PurchaseOrder;
+
+public class PatchPurchaseProductQuantityEndpoint(PyroFetesDbContext database) : Endpoint<PatchPurchaseOrderPurchaseConditionsDto, GetPurchaseOrderDto>
+{
+    public override void Configure()
+    {
+        Patch("/api/purchaseOrders/{Id}/PurchaseConditions", x => new { x.Id });
+        AllowAnonymous();
+    }
+
+    public override async Task HandleAsync(PatchPurchaseOrderPurchaseConditionsDto req, CancellationToken ct)
+    {
+        var purchaseOrder = await database.PurchaseOrders.SingleOrDefaultAsync(po => po.Id == req.Id, ct);
+        if (purchaseOrder == null)
+        {
+            await Send.NotFoundAsync(ct);
+            return;
+        }
+        
+        purchaseOrder.PurchaseConditions = req.PurchaseConditions;
+        await database.SaveChangesAsync(ct);
+
+        GetPurchaseOrderDto responseDto = new()
+        {
+            Id = purchaseOrder.Id,
+            PurchaseConditions = purchaseOrder.PurchaseConditions,
+            GetPurchaseProductDto = purchaseOrder.PurchaseProducts
+                .Select(p => new GetPurchaseProductDto
+                {
+                    ProductId = p.ProductId,
+                    ProductReferences = p.Product.Reference,
+                    ProductName = p.Product.Name,
+                    ProductDuration = p.Product.Duration,
+                    ProductCaliber = p.Product.Caliber,
+                    ProductApprovalNumber = p.Product.ApprovalNumber,
+                    ProductWeight = p.Product.Weight,
+                    ProductNec = p.Product.Nec,
+                    ProductImage = p.Product.Image,
+                    ProductLink = p.Product.Link,
+                    ProductMinimalQuantity = p.Product.MinimalQuantity,
+                    PurchaseOrderId = p.PurchaseOrderId,
+                    Quantity = p.Quantity,
+                }).ToList()
+        };
+        await Send.OkAsync(responseDto, ct);
+    }
+}
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