To provide an electronic apparatus which prevents a key top from falling without increasing the size and complicating the structure.

An electronic apparatus includes: a wiring board having a pressing switch; a first housing and a second housing that are assembled facing each other, thereby housing the wiring board; and a key switch that presses the pressing switch in conjunction with pressing operations of an operator. The first housing has: a through hole where one opening faces the pressing switch and the other opening faces the external side; and a groove formed in the surface direction at the external side. The key switch has: a key top which is partially exposed from the first housing and is inserted into the groove; a relay body engaging with the key top and at least partially inserted into the through hole; and a presser pressing the pressing switch in conjunction with the pressing operations of the key top by the operator.