diff --git a/src/main/java/com/hcommerce/heecommerce/inventory/AmountIsNotPositiveException.java b/src/main/java/com/hcommerce/heecommerce/inventory/AmountIsNotPositiveException.java
new file mode 100644
index 00000000..3ccda122
--- /dev/null
+++ b/src/main/java/com/hcommerce/heecommerce/inventory/AmountIsNotPositiveException.java
@@ -0,0 +1,7 @@
+package com.hcommerce.heecommerce.inventory;
+
+public class AmountIsNotPositiveException extends RuntimeException {
+    public AmountIsNotPositiveException() {
+        super("수량이 양수인지 확인해주세요");
+    }
+}
diff --git a/src/main/java/com/hcommerce/heecommerce/inventory/InventoryCommandRepository.java b/src/main/java/com/hcommerce/heecommerce/inventory/InventoryCommandRepository.java
index 99ae66ef..5da98ca0 100644
--- a/src/main/java/com/hcommerce/heecommerce/inventory/InventoryCommandRepository.java
+++ b/src/main/java/com/hcommerce/heecommerce/inventory/InventoryCommandRepository.java
@@ -31,14 +31,24 @@ public void delete(UUID dealProductUuid) {
     }
 
     public int decreaseByAmount(UUID dealProductUuid, int amount) {
+        validationAmountIsPositive(amount);
+
         String key = super.getRedisKey(dealProductUuid);
 
         return (int) redisStringsRepository.decreaseByAmount(key, Long.valueOf(amount));
     }
 
     public void increaseByAmount(UUID dealProductUuid, int amount) {
+        validationAmountIsPositive(amount);
+
         String key = super.getRedisKey(dealProductUuid);
 
         redisStringsRepository.increaseByAmount(key, Long.valueOf(amount));
     }
+
+    private void validationAmountIsPositive(int amount) {
+        if(amount <= 0) {
+            throw new AmountIsNotPositiveException();
+        }
+    }
 }