The present invention relates to a foldable wheelchair frame (10) comprising two side frame components (11a, 11b), respectively a left and a right side frame components, each mounting front and rear wheels (12a, 13a 12b, 13b), said side frame components (11a, 11b) being connected together for relative folding movement between an erected position and a folded position by foldable link means (20) extending between said two side frame components (11a, 11b), wherein the foldable link means (20) comprises at least one central strut (21) disposed between said two side frame components (11a, 11b) and connected to each side frame component (11a, 11b) by at least two connecting arms, respectively a first left and a second left connecting arms (22a, 23a 22a, 23a) connected to the left side frame component (11a) and a first right and a second right connecting arms (22b, 23b 22b, 23b) connected to the right side frame component (11b), each of said connecting arms being pivotally connected at one end to one of said side frames (11a, 11b) and at one other end to said central strut (21) such that said side frame components (11a, 11b) move closer to each other and said central strut (21) moves along a longitudinal direction when the wheelchair frame moves from its erected position to its folded position, and wherein said central strut (21) comprises at least one locking element (24, 25), said locking element defining a first left and a second left abutments (26a, 26a), respectively a first right and a second right abutments (26b, 26b), against which abuts a left locking pin (27a), respectively a right locking pin (27b), protruding from the lower or upper face (28, 28) of one of said first left and said second left, respectively said first right and said second right, connecting arms in a vertical direction, said first left abutment (26a), respectively said first right abutment (26b), corresponding to the erected position of the wheelchair frame and said second left abutment (26a),
