A walking assistance mechanism according to the present invention comprises: a waist side link； a thigh side link connected to the waist side link to be able to relatively swing in a front-rear direction of a user by means of a hip joint side swinging shaft； a lower leg side link connected to the thigh side link to be able to relatively swing in the front-rear direction by means of a knee joint side swinging shaft； a knee extension posture maintenance mechanism that regulates relative swinging between the thigh side link and the lower leg side link to maintain a knee extension posture in which the relative angle between the thigh side link and the lower leg side link increases； and a knee bending posture allowance mechanism that releases the regulation of the knee extension posture maintenance mechanism to allow a knee bending posture in which the relative angle between the thigh side link and the lower leg side link becomes smaller, when the thigh side link is located behind a position where a predetermined reference relative angle is formed with respect to the waist side link. According to the present invention, the walking assistance mechanism that allows, while walking, a knee on a leg on the front side of a pedestrian to be extended and allows a knee on a leg on the rear side of the pedestrian to be bent can be provided.Selon l'invention, un mécanisme d'aide à la marche comprend : une attache côté taille； une attache côté cuisse reliée à l'attache côté taille pour permettre un balancement relatif dans le sens avant-arrière d'un utilisateur, au moyen d'une tige oscillante côté articulation de la hanche； une attache côté jambe reliée à l'attache côté cuisse pour permettre un balancement relatif dans le sens avant-arrière, au moyen d'une tige oscillante côté articulation du genou； un mécanisme de maintien de posture d'extension du genou qui régule le balancement relatif entre l'attache côté cuisse et l'attache côté jambe pour maintenir une posture d'extension du g
