A floppy disk drive apparatus includes a spindle for holding a floppy disk, a motor which is driven in response to a drive signal from a drive signal generator, thereby rotating the spindle, a head for writing data into this floppy disk and reading out data therefrom, and a control circuit which detects an index hole of the floppy disk and generates an index signal. This control circuit is provided with an inhibiting circuit for inhibiting the drive signal supplied to the motor when it has been detected that the floppy disk is not held on the spindle.