A pair of detachable crutches extends in a longitudinal direction, where each of the detachable crutches includes a metal ball having magnetic properties and a holder having magnetic properties. A magnetic force is generated between the metal ball provided at one of the crutches and the holder provided at the other one of the crutches so as to maintain attachment therebetween. Each of the crutches further includes a sensor configured to sense whether the metal ball and the holder have been attached to each other.
