This paper reports low-cost PDMS/glass based DNA microbiochip for the restriction enzyme reaction and its products detection using the capillary electrophoresis. The microbiochip ($25mm{ imes}75mm$) has the heater integrated reactor ($5{mu}{ell}$) for DNA restriction enzyme reaction at $37^{circ}C$ and the microchannel ($80;{mu}m{ imes}100;{mu}m{ imes}58mm$) for the capillary electrophoresis detection. It is experimentally confirmed that the digestion of the plasmid ($pGEM^{(R)}-4Z$) by the enzyme (Hind III and Sca I) is performed for less than 10 min and its electrophoresis detection is able to sequentially on the fabricated microbiochip.