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).Linvention concerne une béquille (1) pour un avant-bras (F) dune personne pour supporter ladite personne, comprenant : un élément sétendant longitudinalement (20) ayant une première extrémité libre (21) dengagement avec le sol, une poignée (30) reliée audit élément sétendant longitudinalement (20), laquelle poignée (30) est conçue pour pouvoir être saisie manuellement par ladite personne, et un manchon (10) relié audit élément sétendant longitudinalement (20), lequel manchon (10) forme une surface de contact (10a) qui est conçue pour supporter ledit avant-bras, lorsque ladite poignée (30) est tenue par une main (H) associée audit avant bras (F). Selon linvention, la surface de contact (10a) comprend un renfoncement en particulier vertical, en particulier latéralement par rapport à une ligne intermédiaire (M) du manchon (10), lequel renfoncement (100) est conçu pour recevoir le cubitus (U) dudit avant bras (F) lorsque ladite poignée (30)
