A crane comprising: an actuator (23, 24, 25, 26m, 26s); a control apparatus that is configured to control the actuator (23, 24, 25, 26m, 26s) of a boom based on a target speed signal relating to a moving direction and a speed of a load suspended from the boom by a wire rope (14, 16); a swivel angle detection section for the boom; a luffing angle detection section for the boom; an extension/retraction length detection section for the boom; and an acceleration detection section configured to detect an acceleration of a suspending tool or the load, characterized in that: the control apparatus is further configured to: convert the target speed signal into a target position of the load relative to a reference position every predetermined unit time, compute a current position of a boom tip relative to the reference position every unit time that is the unit time from a swivel angle detected by the swivel angle detection section, a luffing angle detected by the luffing angle detection section and an extension/retraction length detected by the extension/retraction length detection section, compute a spring constant of the wire rope (14, 16) every unit time that is the unit time from a previously-computed position of the load the unit time before, the current position of the boom tip and a current acceleration of the suspending tool or the load, the current acceleration being detected every unit time that is the unit time by the acceleration detection section, compute a target position of the boom tip for the target position of the load every unit time that is the unit time from the current acceleration of the suspending tool or the load, the spring constant of the wire rope (14, 16) and the target position of the load, and generate an operation signal for the actuator (23, 24, 25, 26m, 26s) every unit time that is the unit time, based on the target position of the boom tip. an actuator (23, 24, 25, 26m, 26s); a control apparatus that is configured to control the actuator (23, 24, 25, 26m, 26s) of a boom based on a target speed signal relating to a moving direction and a speed of a load suspended from the boom by a wire rope (14, 16); a swivel angle detection section for the boom; a luffing angle detection section for the boom; an extension/retraction length detection section for the boom; and an acceleration detection section configured to detect an acceleration of a suspending tool or the load, characterized in that: the control apparatus is further configured to: convert the target speed signal into a target position of the load relative to a reference position every predetermined unit time, compute a current position of a boom tip relative to the reference position every unit time that is the unit time from a swivel angle detected by the swivel angle detection section, a luffing angle detected by the luffing angle detection section and an extension/retraction length detected by the extension/retraction length detection section, compute a spring constant of the wire rope (14, 16) every unit time that is the unit time from a previously-computed position of the load the unit time before, the current position of the boom tip and a current acceleration of the suspending tool or the load, the current acceleration being detected every unit time that is the unit time by the acceleration detection section, compute a target position of the boom tip for the target position of the load every unit time that is the unit time from the current acceleration of the suspending tool or the load, the spring constant of the wire rope (14, 16) and the target position of the load, and generate an operation signal for the actuator (23, 24, 25, 26m, 26s) every unit time that is the unit time, based on the target position of the boom tip. the control apparatus is further configured to: convert the target speed signal into a target position of the load relative to a reference position every predetermined unit time, compute a current position of a boom tip relative to the reference position every unit time that is the unit time from a swivel angle detected by the swivel angle detection section, a luffing angle detected by the luffing angle detection section and an extension/retraction length detected by the extension/retraction length detection section, convert the target speed signal into a target position of the load relative to a reference position every predetermined unit time, compute a current position of a boom tip relative to the reference position every unit time that is the unit time from a swivel angle detected by the swivel angle detection section, a luffing angle detected by the luffing angle detection section and an extension/retraction length detected by the extension/retraction length detection section, compute a spring constant of the wire rope (14, 16) every unit time that is the unit time from a previously-computed position of the load the unit time before, the current position of the boom tip and a current acceleration of the suspending tool or the load, the current acceleration being detected every unit time that is the unit time by the acceleration detection section, compute a target position of the boom tip for the target position of the load every unit time that is the unit time from the current acceleration of the suspending tool or the load, the spring constant of the wire rope (14, 16) and the target position of the load, and generate an operation signal for the actuator (23, 24, 25, 26m, 26s) every unit time that is the unit time, based on the target position of the boom tip.