To provide a movable working platform capable of traveling in any direction of at least, the front, rear, right, or left in the self-traveling movable working platform having driving wheels.

This movable working platform has a working platform body 2, a universal wheel 4 arranged so as to capable of supporting the working platform body 2 and at least a pair of driving wheels 5A and 5B arranged so as to be mutually dependently drivable, and has a pedestal 28 for rotatably arranging the driving wheels 5A and 5B on the working platform body 2, a first engaging recessed part 30 and a second engaging recessed part 31 arranged at a 90-degree interval on the outer periphery of the pedestal 28, a pin member 32 engagably arranged in these parts. and an operation lever 35 for operating the pin member 32, so that travel in the straightly horizontal direction can be performed by independently changing the direction of the driving wheels 5A and 5B from the working platform body 2 in addition to an advance, a retreat, a direction change in the lateral direction and also turning on the spot.