Disclosed is a laminated floor using a poly lactic acid (PLA) resin, of which a surface layer is formed of the PLA resin, thereby being environment-friendly and providing soft feeling and excellent workability. The laminated floor using a PLA resin, which is constructed on floor, includes a bottom layer formed of a HDF or MDF; and a surface layer comprising a reinforcement layer, a printed layer, a transparent layer and a surface treatment layer which are stacked on the bottom layer, wherein one or more of the reinforcement layer, the printed layer, the transparent layer and the surface treatment layer are formed of the PLA resin.