A safety ensuring device for a disc apparatus, which includes a lid and a spindle motor for rotating a disc, includes a first switch operable by the lid, a first controller electrically coupled to the first switch, a second switch simultaneously operable by the lid when activating the first switch, and a second controller electrically coupled to the second switch. The first controller is configured for receiving signals from the first switch and controls rotation of the spindle motor based on the received signals from the first switch. The second controller is configured for receiving signals from the second switch and controls the rotation of the spindle motor based on the received signals from the second switch. A disc apparatus utilizing the safety ensuring device is also disclosed.