bicycle frame to vibrate so as to massage the body of a user of the exercise bicycle while the user is engaged in the pedalling exercise the exercise bicycle can be used as a body massaging machine by actuating the clutch device to disable the pedal device application_number US 9592898 A description as shown in all drawings provided herewith an exercise bicycle embodied in the present invention is composed of a vibration device 30 a frame 40 a driving device 35 a pedal device 60 and a clutch device the vibration device 30 is composed of a base 10 which is rested on a ground or floor a vibration seat 20 and a motor 31 the vibration seat 20 is platelike in construction and is provided at the top thereof with a shield 25 and along the edges of the underside thereof with a plurality of elastomers 22 of a rubber material the elastomers 22 have a tapered top and a bottom which is fastened with the upper surface of the base 10 the vibration seat 20 is capable of a horizontal reciprocating motion the motor 31 is mounted on the vibration seat 20 such that the motor 31 is housed in the shield 25 the motor 31 has a rotary shaft 311 which is extended at the bottom end thereof into the vibration seat 20 and is provided with an inertia fly wheel 32 the bottom end of the rotary shaft 311 is provided with an eccentric columnar body 33 and a bearing 34 which are received.