Stair climber (1) comprising a supporting frame (2), a maneuvering tiller (3) constrained to said frame, and a tracked movement device (4) combined with said frame to displace said stair climber along a staircase (S), or along a sliding plane (P), said stair climber further comprising lifting means (5) to lift said tracked device (4) from said sliding plane (P), said lifting means comprising at least one first rear wheel (6) and at least one supporting lever (7) having a first arm (8) to which said at least one first rear wheel is rotatably constrained around a first horizontal axis (X), said supporting lever (7) being rotatably constrained to said supporting frame around a second horizontal axis (Y), wherein said supporting lever (7) comprises a second arm (9) distinct from said at least one first arm (8) and rotatable around said at least one second horizontal axis (Y), and wherein said lifting means further comprise at least one second rear wheel (10) constrained to said at least one second arm (9) in a position with respect to said at least one first rear wheel such that said at least one second rear wheel (10) and said at least one first rear wheel (6) are contemporaneously in contact with said sliding plane (P) at least when said maneuvering tiller (3) is subject to a thrust torque to rotate said supporting frame (2) backwards around said second horizontal axis (Y) and to lift said tracked device (4) from said sliding plane (P), characterized in that said at least one second rear wheel (10) is swivellingly constrained to said at least one second arm (9).La présente invention concerne un monte-escalier (1) comprenant un cadre de support (2), une barre de manœuvre (3) limitée audit cadre, et un dispositif de déplacement à chenilles (4) combiné audit cadre pour déplacer ledit monte-escalier le long d'un escalier (S), ou le long d'un plan de coulissement (P), ledit monte-escalier comprenant en outre des moyens de levage (5) pour soulever ledit dispositif à chenill
