A valve timing control apparatus comprising: a drive-side rotational member (1, 11) that synchronously rotates with a drive shaft of an internal combustion engine; a driven-side rotational member (2, 12) that is disposed inside the drive-side rotational member to be coaxial to the drive-side rotational member and that integrally rotates with a valve opening/closing camshaft (101, 206) of the internal combustion engine; a hydrostatic pressure chamber that is formed by partitioning a space between the drive-side rotational member and the driven-side rotational member; an advance angle chamber (41, Ra) and a retardation angle chamber (42, Rb) that are formed by dividing the hydrostatic pressure chamber with a dividing section provided on at least one of the drive-side rotational member and the driven-side rotational member; an intermediate lock mechanism (8, L) that is able to selectively switch, through supplying and discharging of a hydraulic fluid, between a locked state in which a relative rotational phase of the driven-side rotational member to the drive-side rotational member is restricted to an intermediate lock phase between the largest advance angle phase and the largest retardation angle phase and an unlocked state in which the restriction to the intermediate lock phase is released; an advance angle flow path (43, 221) that allows the hydraulic fluid which is supplied to and discharged from the advance angle chamber to be circulated; a retardation angle flow path (44, 222) that allows the hydraulic fluid which is supplied to and discharged from the retardation angle chamber to be circulated; a control valve (51, V) that has a spool (52, 232) which moves between a first position in a case where a power supply amount is zero and a second position different from the first position in a case of power supply; and a phase control unit that controls the control valve by controlling a power supply amount to the control valve and that supplies a hydraulic fluid to the advance angle chamber and the retardation angle chamber to shift the relative rotational phase, and when the spool is disposed at one of the first position and the second position, the intermediate lock mechanism enters into a locked state and the hydraulic fluid is supplied to both the advance angle chamber and the retardation angle chamber, characterized in that, when the spool is disposed at the other position of the first position and the second position, the intermediate lock mechanism enters into a locked state and the hydraulic fluid is supplied to one of the advance angle chamber and the retardation angle chamber and is discharged from the other chamber. a drive-side rotational member (1, 11) that synchronously rotates with a drive shaft of an internal combustion engine; a driven-side rotational member (2, 12) that is disposed inside the drive-side rotational member to be coaxial to the drive-side rotational member and that integrally rotates with a valve opening/closing camshaft (101, 206) of the internal combustion engine; a hydrostatic pressure chamber that is formed by partitioning a space between the drive-side rotational member and the driven-side rotational member; an advance angle chamber (41, Ra) and a retardation angle chamber (42, Rb) that are formed by dividing the hydrostatic pressure chamber with a dividing section provided on at least one of the drive-side rotational member and the driven-side rotational member; an intermediate lock mechanism (8, L) that is able to selectively switch, through supplying and discharging of a hydraulic fluid, between a locked state in which a relative rotational phase of the driven-side rotational member to the drive-side rotational member is restricted to an intermediate lock phase between the largest advance angle phase and the largest retardation angle phase and an unlocked state in which the restriction to the intermediate lock phase is released; an advance angle flow path (43, 221) that allows the hydraulic fluid which is supplied to and discharged from the advance angle chamber to be circulated; a retardation angle flow path (44, 222) that allows the hydraulic fluid which is supplied to and discharged from the retardation angle chamber to be circulated; a control valve (51, V) that has a spool (52, 232) which moves between a first position in a case where a power supply amount is zero and a second position different from the first position in a case of power supply; and a phase control unit that controls the control valve by controlling a power supply amount to the control valve and that supplies a hydraulic fluid to the advance angle chamber and the retardation angle chamber to shift the relative rotational phase, and when the spool is disposed at one of the first position and the second position, the intermediate lock mechanism enters into a locked state and the hydraulic fluid is supplied to both the advance angle chamber and the retardation angle chamber, characterized in that, when the spool is disposed at the other position of the first position and the second position, the intermediate lock mechanism enters into a locked state and the hydraulic fluid is supplied to one of the advance angle chamber and the retardation angle chamber and is discharged from the other chamber.