Abstract: A mouse with an analog-signal selector button and a method for shifting the analog-signal selector button thereof are revealed. The analog-signal selector button includes a selector button and a selector button circuit. A height difference is equally divided into a number of N travels each of which is defined as a travel range when the selector button is pressed down to the deepest position from the original position. Then a number of N voltage ranges are generated according to the N travel ranges. A mouse circuit generates a number of N characteristic ranges according to the N travel ranges. The characteristic range is changed to a higher one when the selector button is pressed down from the nth travel range to the (n+1)th travel range, or changed to a lower one when the selector button is released from the (n+1)th travel range to the nth travel range.