A multipurpose bicycle exercise machine is disclosed. The multipurpose bicycle exercise machine according to the present invention comprises: a body； an arm exercise unit provided on the body to be able to rotate in the forward or backward direction； a foot exercise unit provided on the body to be able to rotate in the forward or backward direction； and an independent driving switch unit provided on the arm exercise unit so as to independently operate left and right arm cranks of the arm exercise unit, wherein the arm exercise unit has a flywheel such that, when the left and right arm cranks rotate in the forward and backward directions, a load is applied to the flywheel and makes the user exercise.
