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 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 , 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 , 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 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 , 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 , 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 . <EOS>