To provide a battery fixing structure capable of saving a space and suppressing breakage due to impact when dropped.

A battery fixing structure fixes a battery to a housing formed by fitting a front case and a rear case. Near a boundary between one side surface of the battery and the other side surface adjacent to each other, a housing side battery fixing portion configured by a first fixing shape formed on the front case and a second fixing shape formed on a rear case adjacently to the first fixing shape, is disposed to face the one side surface of the battery via a predetermined clearance. The housing side battery fixing portion has a complementary shape with the one side surface of the battery, and the housing side battery fixing portion and the battery are fitted with each other. When the battery moves in a direction decreasing a clearance, the first fixing shape and the second fixing shape come into contact with the one side surface of the battery, thereby suppressing the movement of the battery.