Electronic device including housing having at least one through hole

An electronic device comprising:

• a housing including a first surface, a second surface, and a third surface defining an internal space of the housing;
• a touch screen display interposed between the first surface and the second surface;
• a sensor module disposed under the touch screen display and including a light emitting unit and a light receiving unit;
• and
• a wireless communication circuit disposed in the internal space,
• wherein the third surface includes a plurality of through holes each including optical structures, the plurality of through holes formed at a specified angle relative to a plane of the first and second surfaces,
• wherein a portion of light emitted from the light emitting unit is guided to an exterior of the electronic device through a first optical structure of a first through hole, and
• wherein at least a portion of light introduced from the exterior of the electronic device is guided to the light receiving unit on a second optical structure of a second through hole.