The invention relates to a crutch (1) for a forearm (F) of a person for supporting said person, comprising: a longitudinally extending member (20) having a floor-engaging first free end (21), a handle (30) connected to said longitudinally extending member (20), which handle (30) is designed to be manually graspable by said person, and a cuff (10) connected to said longitudinally extending member (20), which cuff (10) forms a contact surface (10a) that is designed to support said forearm, when said handle (30) is held by a hand (H) associated to said forearm (F). According to the invention, the contact surface (10a) comprises a particularly vertical recess, particularly laterally from a midline (M) of the cuff (10), which recess (100) is designed to receive the ulna bone (U) of said forearm (F) when said handle (30) is held by said hand (H) associated to said forearm (F). The cuff (10) may comprise a cushion (12), which is fastened to an inner side (11a) of a shell of the cuff (10), wherein the cushion (12) comprises said recess (100).
