Storage and retrieval machine with a mast (10), at least one chassis (1, 1′) for supporting the mast (10), at least one rail (4, 4′), on which the at least one chassis (1, 1′) can be moved back and forth, as well as at least one lift carriage (1″) vertically shiftable on the mast (10), wherein the mast (10) is formed of at least two supports (11, 11′) that are spaced from each other in the moving direction of the at least one chassis (1, 1′) and are connected to each other via at least one transversal bar (12, 12′) to obtain a mast profile, wherein the attachment of the at least one transversal bar (12, 12′) to the supports is resistant to bending.