An active stylus without function keys is disclosed to include a pen body defining therein an accommodation chamber, a control device mounted inside the accommodation chamber and including a circuit board capable of outputting a signal to a touch control device of a touch screen being touched by the active stylus and two first conductors electrically connected to the circuit board, and a rotating barrel rotatably mounted on the pen body around the control device, the rotating barrel including a second conductor movable with the rotating barrel relative to the pen body into contact with either or both of the two first conductors or away from the first conductors to provide one of a series of signals for driving circuit board to output a corresponding control signal to the touch control device of the touch screen.