The object of the present invention is to enable reliable supply of oxygen which is necessary for a fuel cell to generate electric power, to the fuel cell.In a camera, air orifices for linking the space inside a cell compartment with the outside of a casing are disposed in a position other than the portion (grip portion) which is held by a user, in the vicinity of the center of the front surface of the casing, that is, in the vicinity of a lens-barrel, and a concave-convex portion serving as an air orifice guard is formed at the side opposite to that where the lens-barrel is disposed with respect to the air orifices. As a result, even when the user takes a picture of an object by holding the camera with his/her own hand, the air orifices are prevented from being closed by the user's hand, oxygen (air) can be constantly supplied to the fuel cell accommodated inside the cell compartment, and the fuel cell can continuously generate a sufficient quantity of electricity. The present invention can be employed in a camera.