PROBLEM TO BE SOLVED: To provide a manufacturing method for preventing the occurrence of short shots when manufacturing a resin molded body for controlling pests by injection molding. SOLUTION: A plurality of reinforcing members 2 are arranged inside an outer frame body 1 and the outer frame body 1, and a plurality of square members 3 having at least a three-dimensional curved portion inside the outer frame body 1 are arranged. In a method of producing a resin molded body for controlling pests by injection molding, after filling a resin composition containing a volatile insect repellent and a resin into an injection molding machine, the outer frame body 1, the square member 3, and the reinforcing member 2 The total length of each is a (cm), the number of gates provided in the mold used in injection molding is b (pieces), the load is 2.16 kgf based on the resin composition JIS K7210, and the test is performed. When the logarithmic value of the melt flow rate (g / 10min) measured at a temperature of 190 ° C. is c, (formula) a / (b × c) ≦ 100 is satisfied, and injection molding is performed in a mold. [Selection diagram] Fig. 1【課題】射出成形で該害虫防除用樹脂成形体を製造する際のショートショットの発生を防ぐ、製造方法の提供。【解決手段】外枠体１及び該外枠体１の内側に複数の補強部材２及び該外枠体１の内側に少なくとも一部に立体状の曲部を有する複数の角材３が配されてなる害虫防除用樹脂成形体を射出成形により製造する方法において、揮散性防虫剤と樹脂を含有する樹脂組成物を射出成形機に充填した後、外枠体１、角材３、及び補強部材２のそれぞれの長さの総和をａ（ｃｍ）、射出成形にて使用される金型に設けられたゲートの数をｂ（個）、樹脂組成物のＪＩＳ Ｋ７２１０に基づいて荷重２．１６ｋｇｆ、かつ試験温度１９０℃で測定されるメルトフローレート（ｇ／１０ｍｉｎ）の対数値をｃとしたときに、（式）ａ／（ｂ×ｃ）≦１００を満足させて、金型内に射出成形する。【選択図】図１
