A controller of a toroidal continuously variable transmission (10, 410) in which a transmission ratio is continuously changed depending on a roller position of a power roller, the controller comprising: a hydraulic actuator which changes the roller position; and a position control unit (72, 372) which outputs a driving signal to the hydraulic actuator to control the roller position, wherein the hydraulic actuator includes a biasing mechanism which forcibly keeps the roller position at a predetermined position in a case where the driving signal meets a predetermined condition, wherein the position control unit (72, 372) is configured to perform a start-up control during start-up of the toroidal continuously variable transmission (10, 410), and wherein during the start-up control, the position control unit (72, 372) is configured to output a pulse signal as the driving signal to reciprocate a spool of the hydraulic actuator in a case where a temperature of hydraulic oil supplied to the hydraulic actuator is lower than a reference temperature, output the driving signal which meets the predetermined condition to keep the roller position at the predetermined position in a case where the temperature of the hydraulic oil has become equal to or higher than the reference temperature thereafter, and set a wave height of the pulse signal to a smaller value as the temperature of the hydraulic oil is higher. a hydraulic actuator which changes the roller position; and a position control unit (72, 372) which outputs a driving signal to the hydraulic actuator to control the roller position, wherein the hydraulic actuator includes a biasing mechanism which forcibly keeps the roller position at a predetermined position in a case where the driving signal meets a predetermined condition, wherein the position control unit (72, 372) is configured to perform a start-up control during start-up of the toroidal continuously variable transmission (10, 410), and wherein during the start-up control, the position control unit (72, 372) is configured to output a pulse signal as the driving signal to reciprocate a spool of the hydraulic actuator in a case where a temperature of hydraulic oil supplied to the hydraulic actuator is lower than a reference temperature, output the driving signal which meets the predetermined condition to keep the roller position at the predetermined position in a case where the temperature of the hydraulic oil has become equal to or higher than the reference temperature thereafter, and set a wave height of the pulse signal to a smaller value as the temperature of the hydraulic oil is higher. output a pulse signal as the driving signal to reciprocate a spool of the hydraulic actuator in a case where a temperature of hydraulic oil supplied to the hydraulic actuator is lower than a reference temperature, output the driving signal which meets the predetermined condition to keep the roller position at the predetermined position in a case where the temperature of the hydraulic oil has become equal to or higher than the reference temperature thereafter, and set a wave height of the pulse signal to a smaller value as the temperature of the hydraulic oil is higher.