Abstract: A surgical cutting instrument is carried on the small finger of a surgeon's hand to enable cuts to be made while the surgeon holds another instrument in the same hand. The cutting instrument cmprises a sleeve mounted on the surgeon's small finger, and a scissor mounted on the sleeve. The sleeve includes a single stationary blade and a single movable blade, each projecting forwardly of the sleeve. The movable blade is mounted for rotation and includes an actuating arm extending generally laterally of the sleeve and toward the adjacent ring finger of the same hand so as to be actuable to a cutting position relative to the stationary blade by bending of the ring finger.