The invention relates to a lower exoskeleton intended to be worn by a user and comprising: a pelvic element (1) provided with means for securing to an upper part of the users body two lower supports (2) which are provided with means for securing to the users lower limbs and which rest on the ground during stance phases, each of said supports comprising a thigh segment and a tibia segment connected by a knee link configured to allow flexion and extension between the thigh segment and the leg segment and hip links for connecting the two lower supports to the pelvic element. According to the invention, the pelvic element comprises: an inner segment (30) extending symmetrically in relation to a central sagittal plane and associated with means for securing to the user and two outer segments (33) extending symmetrically and being connected to respective distal ends of the inner segment by means of linking members (31, 32, 34 31&prime), allowing at least flexion between the inner segment and each outer segment along two orthogonal axes. Each lower support is connected by one of the hip links to one of the outer segments (33).
