PROBLEM TO BE SOLVED: To provide a skin characteristic measuring device easily connected to various kinds of mobile terminals, and provide a mobile terminal to which the skin characteristic measuring device is connected.SOLUTION: The skin characteristic measuring device includes a measurement part 15 measuring skin characteristic, a detection circuit where electric signals output from the measurement part 15 are input, and a plug terminal 16 serving as an input/output terminal of the detection circuit. The plug terminal 16 is connected to an earphone jack 4. A skin characteristic measuring device 14 can be connected to the existing earphone jack 4, so that the skin characteristic measuring device 14 easily connected to various kinds of mobile terminals 1, and the mobile terminal 1 to which the skin characteristic measuring device 14 is connected, can be provided.