To impart both of an antibacterial property and a decorative effect to a resin molded article, and also, efficiently manufacture the resin molded article.

For a layer on the front side surface, an antibacterial decorative sheet S containing a bactericide, is prepared, and the sheet S is inserted in molds 70, 80 in such a manner that the sheet front side may face a cavity surface 60 side, and the sheet rear side may become an injection resin side, and the molds are engaged and combined, and a fluid resin is filled in the cavity and hardened. Then, the decorative sheet and the hardened resin Ps are bonded, and the molds are opened, and an antibacterial molded article 200 on which the decorative sheet is laminated, is obtained.