Electronic device

An electronic device comprising:

• a first case including a first wall portion formed with a first hook portion projecting towards a casing inside;
• a second case including a second wall portion formed with a second hook portion that projects towards the casing outside and fits together with the first hook portion, and that forms the casing together with the first case;
• a gasket that is housed inside a housing groove formed in the first case, and that is pressed by a face on an opposite side of the second hook portion to an interlocking face with the first hook portion and a bottom face of the housing groove, stopping water between the first case and the second case;
• and
• a restriction wall portion that is formed to the first case, that extends towards the second case side along a back face of an opposite side of the second wall portion to the first hook portion side, and that is set with a height such that a position of an upper end of the restriction wall portion is higher than an upper end of the gasket in a free state of the gasket prior to fitting the first hook portion together with the second hook portion.