A crane comprises a boom (10) having a structure which allows the length of the boom to be changed, and a derricking mechanism (11) configured to rotate the boom (10) to raise and lower the boom with respect to a machine body, wherein: the derricking mechanism (11) includes a linking device (32) connecting one end of a guy line (30) to a distal end of the boom (10); the distal end (13) of the boom (10) has a back surface (21) which faces rearward and a ventral surface (22) which faces forward when the boom is in a vertical position; the linking device (32) includes a joint (36) connected to one end of the guy line (30), and a support device (38) provided on the distal end (13) to support the joint (36) so as to locate the joint (36) at a position away from the back surface (21) and opposite to the ventral surface(22); and the support device (38) includes a holding member (49) which holds the joint (36), the holding member (49) allowing the position of the joint to be selectively changed to a plurality of different positions in a first direction perpendicularly intersecting an axis of the boom and a rotary axis of the boom. The holding member (49) includes a plurality of holding parts (49a) respectively disposed at the different positions in the first direction (A), each of the holding parts (49a) being configured to detachably hold the joint (36). The support device (38) includes a supporting member (50) which is disposed between the holding member (49) and the back surface of the distal end. The supporting member (50) is coupled with the joint (36) held by the holding member (49) to support the holding member (49) at the position of the joint (36) via the joint (36).