To provide a concrete form water permeable member fixing sheet and its fixing method easy in fixing a water permeable member to a form, capable of correcting wrinkles and positional dislocation, and capable of reusing the form.

This concrete form water permeable member fixing sheet 8 is constituted as a sheet having a pressure sensitive adhesive layer 2 and a water absorptive resin-impregnated nonwoven fabric layer 1 of impregnating a water absorptive resin 1a into nonwoven fabric 1b, and can be easily fixed by sticking the water absorptive resin-impregnated nonwoven fabric layer 1 to a form 6 by swelling the water absorptive resin 1a by water, and the wrinkles and the positional dislocation can easily be corrected, and the form 6 can be reused.