To reduce weight and power consumption in an applicable artificial satellite further with a time shortenable till completing attitude control.

In a roll drive signal generating part 4 and a yaw drive signal generating part 5, mainly based on a measurement result in a rate gyro 1, drive signals S1, S2 are respectively generated. In a pitch drive signal generating part 6, without using measurement result of the rate gyro, only based on a detection result of an earth sensor 3, a drive signal S3 is generated. In an actuator drive control part 8, at initial capture time and at recapture time after generation of abnormality, the drive signals S1, S2 are respectively given to roll/yaw actuators, attitude control of a roll/yaw axis is performed, after completion of the attitude control of the roll/yaw axis, the drive signal S3 is given to a pitch actuator, attitude control of a pitch axis is performed.