A crane comprising a multistage telescopic extendable/contractible boom having a base end boom, a jib connected to the boom, and a jib overhanging storage mechanism for overhanging/storing the jib with respect to the boom: the jib overhanging storage mechanism comprising: a guide roller that is provided at one of the jib and the base end boom; a guide that is provided at the other one of the base end boom and the jib, and guides the guide roller; a jib fixing pin that is provided at one of the base end boom and the jib; and a pin socket that is provided at the other one of the jib and the base end boom, and has an insertion hole (48,49) into which the jib fixing pin can be inserted, wherein the guide has a first raceway surface, a second raceway surface and a third raceway surface on which the guide roller rolls; the first raceway surface is shaped such that the jib is pulled toward a bottom surface of the base end boom by the guide roller rolling thereon with contraction of the boom; the second raceway surface is shaped such that the jib moves along the base end boom in a state where the jib is pulled toward the bottom surface of the base end boom by the guide roller rolling thereon with contraction of the boom; the third raceway surface is in a protruded shape protruded from the second raceway surface; the jib fixing pin has a distal end portion formed in a conical shape; the third raceway surface is located in a position between the first and the secondary raceway surfaces (34s, 35s), or an intermediate position of the second raceway surface; the third raceway surface is located in a position where the guide roller passes before and after an apex of the distal end portion of the jib fixing pin passes through a front end opening portion of the insertion hole (48,49), while the jib is pulled toward the bottom surface of the base end boom with contraction of the boom; characterized in that the third raceway surface is a surface of a correction plate that is placed on the second raceway surface. a guide roller that is provided at one of the jib and the base end boom; a guide that is provided at the other one of the base end boom and the jib, and guides the guide roller; a jib fixing pin that is provided at one of the base end boom and the jib; and a pin socket that is provided at the other one of the jib and the base end boom, and has an insertion hole (48,49) into which the jib fixing pin can be inserted, wherein the guide has a first raceway surface, a second raceway surface and a third raceway surface on which the guide roller rolls; the first raceway surface is shaped such that the jib is pulled toward a bottom surface of the base end boom by the guide roller rolling thereon with contraction of the boom; the second raceway surface is shaped such that the jib moves along the base end boom in a state where the jib is pulled toward the bottom surface of the base end boom by the guide roller rolling thereon with contraction of the boom; the third raceway surface is in a protruded shape protruded from the second raceway surface; the jib fixing pin has a distal end portion formed in a conical shape; the third raceway surface is located in a position between the first and the secondary raceway surfaces (34s, 35s), or an intermediate position of the second raceway surface; the third raceway surface is located in a position where the guide roller passes before and after an apex of the distal end portion of the jib fixing pin passes through a front end opening portion of the insertion hole (48,49), while the jib is pulled toward the bottom surface of the base end boom with contraction of the boom; characterized in that the third raceway surface is a surface of a correction plate that is placed on the second raceway surface.