Replica biochips for capillary array electrophoresis with 10 separation channels (50 µm width, 50 µm depth and 100 µm pitch) were successfully fabricated on a poly(methyl methacrylate) (PMMA) substrate using injection molding technique. The current fabrication method used moving mask deep X-ray lithography to fabricate an array of channels with inclined channel sidewalls. A slight inclination of channel sidewalls is highly required to ensure the release of replicated biochips from a mold. Moreover, the sealing of molded PMMA multichannel chips with a PMMA cover film was achieved using a novel bonding technique involving adhesive printing.