A scroll compressor comprising: a scroll compression mechanism which has a fixed scroll and an orbiting scroll and compresses and discharges a refrigerant between the fixed scroll and the orbiting scroll ; a rotary shaft which is a rod-shaped member for orbiting the orbiting scroll ; an oil supply passage which is provided inside the rotary shaft along a longitudinal direction and through which oil flowing in from one end of the rotary shaft is discharged from the other end of the rotary shaft ; a back pressure chamber which is disposed on the rotary shaft side of the orbiting scroll and into which the oil discharged from the other end of the oil supply passage flows; an oil drain passage through which the oil flowing into the back pressure chamber is discharged; a flow rate adjusting mechanism which changes a flow rate of the oil flowing through the oil drain passage ; and a control device which controls the flow rate adjusting mechanism so as to control the flow rate of the oil flowing through the oil drain passage , wherein in a case where an orbital speed of the orbiting scroll is the same as a preset first threshold or equal to or more than a second threshold set to a value larger than the first threshold, the control device controls the flow rate of the oil flowing through the oil drain passage to be equal to or more than a second flow rate which is a value larger than a preset first flow rate, characterized in that in a case where the orbital speed of the orbiting scroll is less than the first threshold, the control device controls the flow rate of the oil flowing through the oil drain passage to be equal to or less than the first flow rate and temporarily increases the flow rate of the oil flowing through the oil drain passage at a predetermined timing determined based on a temperature of the oil in the back pressure chamber . a scroll compression mechanism which has a fixed scroll and an orbiting scroll and compresses and discharges a refrigerant between the fixed scroll and the orbiting scroll ; a rotary shaft which is a rod-shaped member for orbiting the orbiting scroll ; an oil supply passage which is provided inside the rotary shaft along a longitudinal direction and through which oil flowing in from one end of the rotary shaft is discharged from the other end of the rotary shaft ; a back pressure chamber which is disposed on the rotary shaft side of the orbiting scroll and into which the oil discharged from the other end of the oil supply passage flows; an oil drain passage through which the oil flowing into the back pressure chamber is discharged; a flow rate adjusting mechanism which changes a flow rate of the oil flowing through the oil drain passage ; and a control device which controls the flow rate adjusting mechanism so as to control the flow rate of the oil flowing through the oil drain passage , wherein in a case where an orbital speed of the orbiting scroll is the same as a preset first threshold or equal to or more than a second threshold set to a value larger than the first threshold, the control device controls the flow rate of the oil flowing through the oil drain passage to be equal to or more than a second flow rate which is a value larger than a preset first flow rate, characterized in that in a case where the orbital speed of the orbiting scroll is less than the first threshold, the control device controls the flow rate of the oil flowing through the oil drain passage to be equal to or less than the first flow rate and temporarily increases the flow rate of the oil flowing through the oil drain passage at a predetermined timing determined based on a temperature of the oil in the back pressure chamber . <EOS>