PROBLEM TO BE SOLVED: To provide a sheet holder for insect catchers which can improve harmful insect-capturing accuracy by accurately stickng the harmful insects contacting the adhesive surface of a sheet for the insect catcher, and an insect catcher having the sheet holder for the insect catcher. ! SOLUTION: An insect catcher 100 includes an attraction unit 101 which emits light for attracting harmful insects, and a sheet holder 130 for an insect catcher which holds a capturing sheet 120 capturing the harmful insects attracted by the attraction unit 101 to be freely removable. The attraction unit 101 has an LED light source which emits attractive light in an ultraviolet region by a solar battery 106 as an electric power source. The capturing sheet 120 has an adhesive surface 121 for capturing the harmful insects. The sheet holder 130 for the insect catcher has a back surface side regulator 131 to be arranged on the back side of the capturing sheet 120 and a surface side regulator 132 oppositely arranged on an edge part of the surface of the capturing sheet 120. The back surface side regulator 131 and the surface side regulator 132 are arranged and mutually faced through a space S which allows displacement and deformation of the capturing sheet 120 in the width direction. ! COPYRIGHT: (C)2013,JPO&INPIT