Problem to be solved: to provide a concrete curing sheet capable of measuring how much moisture is held between the lower surface side of the concrete curing sheet and the concrete.The concrete curing sheet 1 of the present invention is characterized in that a resin layer 2 having non permeable property, a humidity detecting cloth layer 3 laminated on the lower surface side of the resin layer 2, and a nonwoven layer 4 laminated on the lower surface side of the humidity detecting cloth layer 3 are provided.The initial humidity detecting cloth layer 3 is a fabric made of warp and weft, and has a plurality of first sensing threads, part of the weft, a plurality of second sensing threads, and a conductive first electrode thread extending in the widthwise direction of the woven fabric to connect the plurality of first sensing threads to each other A conductive second electrode thread extending in the transversal direction of the woven fabric is provided so as to connect the plurality of second sensing threads.Diagram
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