A vehicle controller applied to a vehicle drive system (1, 81, 91) including: an internal combustion engine; at least one drive motor; a hydraulic pressure control unit (25, 85, 95) that controls supply of a hydraulic pressure to at least one hydraulic actuation section; a mechanical oil pump that rotates by power of the internal combustion engine and supplies the hydraulic pressure to the hydraulic pressure control unit (25, 85, 95); and an electric oil pump that is driven by supplied electric power and supplies the hydraulic pressure to the hydraulic pressure control unit (25, 85, 95), the vehicle controller comprising: a control mode setting section that sets a control mode of the vehicle drive system (1, 81, 91) to a first control mode in which the internal combustion engine is brought into a stopped state and the vehicle travels only by drive torque output from the drive motor or a second control mode in which the internal combustion engine is brought into an operation state and the vehicle travels at least by drive torque output from the internal combustion engine; and a pump control section that controls driving of the electric oil pump, wherein the pump control section executes processing to predict a start of the internal combustion engine while the control mode of the vehicle drive system (1, 81, 91) is set to the first control mode, increase a rotational frequency of the electric oil pump when the start of the internal combustion engine is predicted, and stop driving of the electric oil pump after the internal combustion engine is started and the control mode of the vehicle drive system (1, 81, 91) is set to the second control mode, wherein the pump control section sets a target rotational frequency of the electric oil pump to a specified first target rotational frequency (rs_tgt1) in a period when the control mode of the vehicle drive system (1, 81, 91) is set to the first control mode and the start of the internal combustion engine is not predicted, sets the target rotational frequency of the electric oil pump to a second target rotational frequency (rs_tgt2) that is higher than the first target rotational frequency (rs_tgt1), and thereby increases the rotational frequency of the electric oil pump when the control mode of the vehicle drive system (1, 81, 91) is set to the first control mode and the start of the internal combustion engine is predicted, sets the target rotational frequency of the electric oil pump in a period until complete ignition of the internal combustion engine is detected from the increase in the rotational frequency of the electric oil pump to a specified third target rotational frequency (rs_tgt3), and sets the target rotational frequency of the electric oil pump in a specified period after the complete ignition of the internal combustion engine is detected to a fourth target rotational frequency (rs_tgt4) that is lower than the second target rotational frequency (rs_tgt2). a control mode setting section that sets a control mode of the vehicle drive system (1, 81, 91) to a first control mode in which the internal combustion engine is brought into a stopped state and the vehicle travels only by drive torque output from the drive motor or a second control mode in which the internal combustion engine is brought into an operation state and the vehicle travels at least by drive torque output from the internal combustion engine; and a pump control section that controls driving of the electric oil pump, wherein the pump control section executes processing to predict a start of the internal combustion engine while the control mode of the vehicle drive system (1, 81, 91) is set to the first control mode, increase a rotational frequency of the electric oil pump when the start of the internal combustion engine is predicted, and stop driving of the electric oil pump after the internal combustion engine is started and the control mode of the vehicle drive system (1, 81, 91) is set to the second control mode, wherein the pump control section sets a target rotational frequency of the electric oil pump to a specified first target rotational frequency (rs_tgt1) in a period when the control mode of the vehicle drive system (1, 81, 91) is set to the first control mode and the start of the internal combustion engine is not predicted, sets the target rotational frequency of the electric oil pump to a second target rotational frequency (rs_tgt2) that is higher than the first target rotational frequency (rs_tgt1), and thereby increases the rotational frequency of the electric oil pump when the control mode of the vehicle drive system (1, 81, 91) is set to the first control mode and the start of the internal combustion engine is predicted, sets the target rotational frequency of the electric oil pump in a period until complete ignition of the internal combustion engine is detected from the increase in the rotational frequency of the electric oil pump to a specified third target rotational frequency (rs_tgt3), and sets the target rotational frequency of the electric oil pump in a specified period after the complete ignition of the internal combustion engine is detected to a fourth target rotational frequency (rs_tgt4) that is lower than the second target rotational frequency (rs_tgt2).