An operation control device for a working vehicle which includes a plurality of hydraulic working devices (31, 32), comprising: a plurality of hydraulic actuators (37, 38) configured to drive the plurality of hydraulic working devices (31, 32); an operating oil supply source that sends out operating oil necessary for driving the plurality of hydraulic actuators (37, 38); a sent-out oil amount control device that controls an amount of oil sent out from the operating oil supply source; an operating device to be configured to be operated with a plurality of kinds of operations to make the plurality of hydraulic actuators (37, 38) work in accordance with corresponding kinds of operations so as to drive the corresponding hydraulic working devices (31, 32); an operating oil supply control device (114, 115) that controls to supply operating oil sent out from the operating oil supply source to the corresponding hydraulic actuator (37, 38) according to the kind of operation of the operating device, and a working gain setting device, which sets a working gain of the hydraulic actuators (37, 38) in response to operations of the operating device, wherein the operating oil supply control device (114, 115) controls to supply operating oil to the corresponding hydraulic actuators (37, 38) based on a working gain set by the working gain setting device and in accordance with an operation of the operating device, the sent-out oil amount control device controls the amount of oil sent out from the operating oil supply source according to the operation amount of the operating device and to the working gain, wherein, when a plurality of operations is performed by the operating device, the sent-out oil amount control device controls the amount of oil sent out from the operating oil supply source according to the sum operation amount of the plurality of operations with the working gain. a plurality of hydraulic actuators (37, 38) configured to drive the plurality of hydraulic working devices (31, 32); an operating oil supply source that sends out operating oil necessary for driving the plurality of hydraulic actuators (37, 38); a sent-out oil amount control device that controls an amount of oil sent out from the operating oil supply source; an operating device to be configured to be operated with a plurality of kinds of operations to make the plurality of hydraulic actuators (37, 38) work in accordance with corresponding kinds of operations so as to drive the corresponding hydraulic working devices (31, 32); an operating oil supply control device (114, 115) that controls to supply operating oil sent out from the operating oil supply source to the corresponding hydraulic actuator (37, 38) according to the kind of operation of the operating device, and a working gain setting device, which sets a working gain of the hydraulic actuators (37, 38) in response to operations of the operating device, wherein the operating oil supply control device (114, 115) controls to supply operating oil to the corresponding hydraulic actuators (37, 38) based on a working gain set by the working gain setting device and in accordance with an operation of the operating device, the sent-out oil amount control device controls the amount of oil sent out from the operating oil supply source according to the operation amount of the operating device and to the working gain, wherein, when a plurality of operations is performed by the operating device, the sent-out oil amount control device controls the amount of oil sent out from the operating oil supply source according to the sum operation amount of the plurality of operations with the working gain.