RUNNING MACHINE

In the present invention, provided is a treadmill, comprising a folding-inducing line which sets a lengthwise direction as an axis direction and is connected in the lower part of a main body and is accordingly rotated; a wheel axis which is extended toward the width direction of the main body from the fold-inducing line; wheels which are connected to the wheel axis and rotate; a cushion part which is inserted the circumference of the wheel and has an air layer the inside, absorbing impact caused by at least one weight among vertical direction and horizontal direction and, therefore, the treadmill of the present invention continues to absorb impact caused by users running on the treadmill or increasing the frequency of use thereof while the movement and the storage of the treadmill are better.