An operation control system for a work apparatus (22) equipped to a work vehicle includes a controller (100) controlling the work apparatus. A first hydraulic valve (261) and a second hydraulic valve (262) control hydraulic pressure supply to the work apparatus. An operation unit (4) provides an operation input signal to the controller. A first mounting base (41) and a second mounting base (42) are provided adjacently to each other in the operation unit. A first single-operation tool (91) is formed mountable on the first mounting base and a second single-operation tool (92) is formed mountable on the second mounting base. Further, a multi-operation tool (90) is mountable so as to straddle both the first mounting base and the second mounting base.
