A wearable device is provided. The wearable device includes a first strap portion attached or detached from a body portion and provided to allow the body portion to be worn on a human body, a second strap portion provided in the body portion to be exchanged with the first strap portion, electrically connected to the body portion, and having at least one member to provide a signal generated from the members to the body portion, and a connecting portion electrically connecting the body portion with the first strap portion or electrically connecting the body portion with the second strap portion.