A treadmill includes a tread assembly, a supporting frame, a control unit and a tread utility assembly. The supporting frame has a lower end portion connected to a front end portion of the tread assembly, and an upper end portion extended from the lower end portion at a predetermined evaluation. The control unit is mounted at the upper end portion of the supporting frame for controlling an operation of the tread assembly. The tread utility assembly includes a utility member frontwardly and movably extended from the control unit to form a utility platform which has a predetermined angle of inclination with respect to the control unit, wherein a user is allowed to simultaneously operate the control unit and run on the tread assembly, and accomplish a predetermined task on the utility platform in a convenient and safe manner.