To provide a battery holder structure for waterproof electric apparatus which has a high waterproof performance and is easy to load and unload a battery.

The battery holder structure for waterproof electric apparatus comprises battery holders 11, 11 which locate a pair of electrode terminals for making contact with electrodes of cylindrical batteries 2, 2 on both ends, a waterproof case for electric gear 10 which is in a shape of a box to house the battery holders 11, 11, a battery mount opening 12 through which the cylindrical batteries 2, 2 are mounted on the battery holders 11, 11 from the outside of the waterproof case for electric gear 10, a mount opening closure lid 13 which closes the battery mount opening 12 with the capability of opening and closing it, and a water-sealing packing 14 with which communication between the battery mount opening 12 and the mount opening closure lid 13 is blocked airtightly. The mount opening closure lid 13 and the battery mount opening 12 have screws respectively, the screws can screw together with each other, and the mount opening closure lid 13 is screwed into the battery mount opening 12 so that the battery mount opening 12 is blocked airtightly.