A water activatable sheet (1) containing a paper material having on at least one surface thereof a porous water absorbing layer (3) that has a liquid absorption volume of from 1 to 10 mL/m 2 , further having provided on the water absorbing layer an adhesive layer (4) containing an aqueous adhesive coated and solidified by drying solves the problems of ordinary glue label, i.e., the wrinkles of a label and the effusion of an adhesive due to dew condensation, the labor on applying the label, and the adhesive deposits on an adherend and the contamination of cleaning water on stripping off the label.