Provided is a wrist wearable terminal including: a body portion including a function module; a coupling portion fastening the body portion on a wrist; and at least one strap portion linking the body portion and the coupling portion and including at least one function module that is coupled to the function module of the body portion via a signal line to convert or activate a use of at least one function of the wrist wearable terminal depending on a state of wearing of the wrist wearable terminal.