A wristwatch includes a watch body having a display unit including a seating part formed on an outer frame of the display unit, and smart glasses having a temple tip detachably coupled to the seating part to constitute at least a portion of a case body or a bezel of the watch body and surrounding at least a portion of the outer frame of the display unit. The temple tip of the smart glasses is formed in a shape corresponding to the seating part of the watch body to surround the outer frame of the display unit of the watch body while being mounted on the watch body and supported by the watch body.