A mobile communication device and an incoming call noticing control method thereof are provided. The incoming call noticing control method is used for controlling a mobile communication device. The mobile communication device includes a main body and a ring unit. The main body has a body surface. The ring unit is used for emitting a ringtone. The incoming call noticing control method includes the follow steps. The vibration frequency and the vibration amplitude of the main body are detected. Whether the body surface is substantially facing a predetermined orientation is detected. The volume of the ringtone is controlled according to whether the body surface is facing the predetermined orientation and according to the vibration frequency and the vibration amplitude.