Although this water-resistant case covers the entire body of a portable receiver, it does not decrease the sound effect of a buzzer from the receiver. The case also offers the same water-proof effect as the prior product. It is a water-resistant portable receiver case that prevents any water from getting into the portable receiver. The characteristics of the subject case is that, it has a display window positioned to match that of the display light on the aforementioned portable receiver, a hole tightly closed with a seal capable of letting the air to get through but not a drop of water positioned to match the buzzer of the aforementioned receiver, and a button to push the switch on the aforementioned receiver from the outside.