The family planning program has a role in reducing the risk of maternal death through prevention of pregnancy, delaying gestational age and spacing pregnancies with the main target of Fertile Age Couples (PUS). The IUD is a contraceptive device that is inserted into the uterus which has various forms, consisting of plastic (polyethylene). This study aims to determine the factors that affect the low participation of mothers as acceptors of intrauterine contraceptives (IUDs) in Bonandolok Village, Sijama Lopang District in 2019. This study used a cross-sectional design. The population in this study were all family planning acceptors in the village of Bonandolok as many as 143, and a sample of 59. Data analysis used the chi square test. The results of the study were there was a relationship between parity (p = 0,000), education (p = 0,000), knowledge (p = 0,000) with the participation of mothers as family planning acceptors and there was no relationship between age (p = 0.353) and the participation of mothers as family planning acceptors. It is hoped that family planning acceptors will be able to take the time to participate in counseling held by health workers at puskesmas about IUDs so that they can increase the knowledge, attitudes and skills of family planning acceptors regarding IUD use.