To provide an operation lever device for outputting a single arbitrary signal or combined arbitrary signals from the three kinds of signals by one hand operation.

When a grip member 15 is moved, at least one of rotary positions is changed, i.e., the rotary position of a front arm member 14 with respect to an upper arm member 13, the rotary position of the upper arm member 13 with respect to a body member 12 and the rotary position of the body member 12 with respect to a leg member 11. Then position sensors 16, 17, 18 respectively output a rotation command signal P1, a derricking motion command signal Q1, and an elevating/lowering command signal R1 to the controller of jib crane 31, which have a value corresponding to the rotary directions and displacement amounts of the members 12, 13, 14. Consequently, the arbitrary one or combination of the three kinds of signals P1, Q1 and R1 are outputted by one hand operation of an operator, so that operability is raised in the jib crane 31.