A controller of a toroidal continuously variable transmission in which a transmission ratio (SR) is continuously changed depending on a roller position (X) of a power roller , the controller comprising: a hydraulic actuator which changes the roller position (X); and a position control unit which outputs a driving signal to the hydraulic actuator to control the roller position (X), wherein the hydraulic actuator includes a biasing mechanism which forcibly keeps the roller position (X) at a predetermined position in a case where the driving signal meets a predetermined condition, wherein the position control unit is configured to perform a start-up control during start-up of the toroidal continuously variable transmission , and wherein during the start-up control, the position control unit is configured to output a pulse signal (A) 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 (T1), output the driving signal which meets the predetermined condition to keep the roller position (X) at the predetermined position in a case where the temperature of the hydraulic oil has become equal to or higher than the reference temperature (T1) thereafter, and set a wave height of the pulse signal (A) to a smaller value as the temperature of the hydraulic oil is higher. a hydraulic actuator which changes the roller position (X); and a position control unit which outputs a driving signal to the hydraulic actuator to control the roller position (X), wherein the hydraulic actuator includes a biasing mechanism which forcibly keeps the roller position (X) at a predetermined position in a case where the driving signal meets a predetermined condition, wherein the position control unit is configured to perform a start-up control during start-up of the toroidal continuously variable transmission , and wherein during the start-up control, the position control unit is configured to output a pulse signal (A) 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 (T1), output the driving signal which meets the predetermined condition to keep the roller position (X) at the predetermined position in a case where the temperature of the hydraulic oil has become equal to or higher than the reference temperature (T1) thereafter, and set a wave height of the pulse signal (A) to a smaller value as the temperature of the hydraulic oil is higher. output a pulse signal (A) 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 (T1), output the driving signal which meets the predetermined condition to keep the roller position (X) at the predetermined position in a case where the temperature of the hydraulic oil has become equal to or higher than the reference temperature (T1) thereafter, and set a wave height of the pulse signal (A) to a smaller value as the temperature of the hydraulic oil is higher. <EOS>