A mobile electronic device includes a first sensor that detects a proximity to an own device, a second sensor that detects a body reaction, and a controller that determines, when the proximity to the own device is detected by the first sensor and the body reaction is detected by the second sensor, that the own device is in a storage part provided on clothes. When it is determined that the own device is in the storage part provided on the clothes, the controller determines whether the clothes correspond to upper-body clothing or lower-body clothing of a user based on rotation information of the own device.
