An image blur correction apparatus that includes a blur detection device, which detects a vibration applied to an optical system and outputs a blur signal in accordance with the detected vibration. Image blur correction is performed to cancel out an image blur that is produced by a vibration applied to the optical system, based on a blur signal output from the blur detection device. A determining device determines whether or not the size of a correction amount, indicating a size of an image blur correction according to the image blur correcting device, exceeds a predetermined threshold value. When the determining device determines that the a size of a correction amount exceeds a predetermined threshold value, the determination device switches from a mode of image blur correction to a mode of a pan/tilt operation.