An electronic apparatus capable of thinning and miniaturizing without causing degradation of antenna characteristics and impairment of operability and its manufacturing method are provided. An electronic apparatus includes: an upper case; a lower case which is connected to the upper case so that the lower case can slide against the upper case; a storage unit placed on a face of the lower case side of the upper case; an antenna stored in the storage unit; and a slot placed on a face of the upper case side of the lower case, wherein the slot has a shape which can store at least part of the storage unit.