Abstract: The present invention relates to a synthetic resin sealing cap for a fluid bottle, comprising an annular cover, a ring-like clamping member, a synthetic resin cap, and a sealing member. In the present invention, just pulling the cover up makes a separation of the cover and the sealing member fixed each other from the synthetic resin sealing cap, thereby conveniently injecting a syringe's needle into the exposed rubber stopper for use of the fluid inside the bottle. And also, the upper surface of the rubber stopper is not contaminated by fragments of aluminium and a surface coating agent since an aluminium cap is not used.