is A wet cleaning sheet including a cleaning fluid-impregnated substrate sheet fiber provided. The substrate sheet is composed of a mesh sheet and a aggregate joined to one or both sides of the mesh sheet with the fibers of the fiber aggregate being The has, on its entangled among themselves and with the mesh sheet. substrate sheet working surface, raised portions and depressed portions, the raised portions and the depressed portions being arranged so as to form a texturing pattern having macroscopically curved portions. In the texturing pattern, a borderline between the raised and depressed portions has a length of at least 10 anti per cm 2 , and the individual raised portions (3) each surrounded by the depressed portion (4) have an area of at least 300 mm 2 . The substrate sheet has a first direction X corresponding to the MD or the main orientation direction of the fibers and a second direction Y perpendicular to the first direction. When imaginary straight lines L extending in the second direction Y are drawn within a rectangular region 280 mm long in the first direction and 200 mm wide in the second direction to determine a first straight line Ll having a maximum total length of its segments crossing over any depressed portion (4) and a second straight line L2 having a minimum total length of such segments, the difference between the maximum and minimum total lengths divided by a shortest distance L3 between the lines Ll and L2 is 10 or greater.