A mobile clean room has a substantially rectangular frame having an upper and lower portion and is formed of a plurality of metal tube members and transparent plastic wall panels affixed to the frame to form an end wall and front and rear walls. A floor plate is affixed to the lower portion of the frame. A plurality of locking swivel wheels affixed to the lower portion of the frame. A ladder is mounted between the floor plate and the upper portion of the frame. A dust guard assembly is attached to the top of the frame and is movably mounted. A door is pivotally mounted to the frame.