A work vehicle comprising: a first traveling unit; a first traveling motor configured to drive the first traveling unit; a first actuator (86,87); a first hydraulic pump; a first hydraulic circuit configured to introduce operating oil from the first hydraulic pump to the first traveling motor and the first actuator (86, 87); a first manipulation member configured to give an instruction on a traveling speed of the first traveling unit; a second traveling unit disposed opposite to the first traveling unit in a left-right direction; a second traveling motor configured to drive the second traveling unit; a second actuator (88,89); a second hydraulic pump; a second hydraulic circuit configured to introduce operating oil from the second hydraulic pump to the second traveling motor and the second actuator (88,89); a second manipulation member configured to give an instruction on a traveling speed of the second traveling unit; and a switching valve configured to be switched between a first state where the switching valve connects the first hydraulic circuit and the second hydraulic circuit to each other and a second state where the switching valve interrupts connection between the first hydraulic circuit and the second hydraulic circuit, characterized in that in a case where both of a first instruction value and a second instruction value are equal to or higher than a threshold, the switching valve is brought into the first state, and in cases other than this, the switching valve is brought into the second state, where the first instruction value corresponds to a value of an instruction signal for the traveling speed of the first traveling unit designated by the instruction given with the first manipulation member and the second instruction value corresponds to a value of an instruction signal for the traveling speed of the second traveling unit designated by the instruction given with the second manipulation member, and wherein a load sensing control is performed on each of the first traveling motor, the first actuator (86,87), the second traveling motor, and the second actuator (88,89). a first traveling unit; a first traveling motor configured to drive the first traveling unit; a first actuator (86,87); a first hydraulic pump; a first hydraulic circuit configured to introduce operating oil from the first hydraulic pump to the first traveling motor and the first actuator (86, 87); a first manipulation member configured to give an instruction on a traveling speed of the first traveling unit; a second traveling unit disposed opposite to the first traveling unit in a left-right direction; a second traveling motor configured to drive the second traveling unit; a second actuator (88,89); a second hydraulic pump; a second hydraulic circuit configured to introduce operating oil from the second hydraulic pump to the second traveling motor and the second actuator (88,89); a second manipulation member configured to give an instruction on a traveling speed of the second traveling unit; and a switching valve configured to be switched between a first state where the switching valve connects the first hydraulic circuit and the second hydraulic circuit to each other and a second state where the switching valve interrupts connection between the first hydraulic circuit and the second hydraulic circuit, characterized in that in a case where both of a first instruction value and a second instruction value are equal to or higher than a threshold, the switching valve is brought into the first state, and in cases other than this, the switching valve is brought into the second state, where the first instruction value corresponds to a value of an instruction signal for the traveling speed of the first traveling unit designated by the instruction given with the first manipulation member and the second instruction value corresponds to a value of an instruction signal for the traveling speed of the second traveling unit designated by the instruction given with the second manipulation member, and wherein a load sensing control is performed on each of the first traveling motor, the first actuator (86,87), the second traveling motor, and the second actuator (88,89).