PROBLEM TO BE SOLVED: To provide a spray aid capable of effectively applying a chemical on a back surface of a leaf without adhering the chemical on fingers.SOLUTION: The injection aid 3 for being mounted to any of a spray part of a trigger-type liquid sprayer, a cover part located in a rear part of the spray part and a hood part provided in the spray part includes a mounting part 31 attachable and detachable to any of the spray part, the cover part and the food part and a long plate-like body part 35 provided in the mounting part 31. The plate-like body part 35 is arranged above the horizontal surface including a spray central axis of a spray area and extends along the spraying direction when mounted to the trigger-type liquid sprayer.COPYRIGHT: (C)2013,JPO&INPIT【課題】指に薬液を付着させずに、葉の裏面に効率よく薬液をかけることのできる噴射補助具を提供する。【解決手段】トリガー式液体噴射器の噴射部、該噴射部の後方に位置するカバー部および前記噴射部に設けられたフード部のいずれかに取り付ける噴射補助具であって、前記噴射部、前記カバー部および前記フード部のいずれかに着脱可能な装着部31と、前記装着部31に設けられた長尺の板状本体部35とを具備し、前記板状本体部35は、前記トリガー式液体噴射器に取り付けた際に、噴射領域の噴射中心軸を含む水平面よりも上方であって且つ噴射方向に沿って延びる噴射補助具3とする。【選択図】図8