Implementation of the Family Planning Management Information System (SIGA) is the use of information technology utilization by the National Population and Family Planning Board to support the successful implementation of the current program. Even though it has been developed since 2017, SIGA has yet to be fully utilized due to the low coverage of family planning service health data registration and activity group data registration, namely 34.15% in 2019. Based on problem tracing, it was found that one of the causes for the low coverage of registration data was the acceptance of SIGA users. Although the use of SIGA has been regulated in the Republic of Indonesia's Government Regulation Number 87 of 2014, only 40.4% of districts/cities of the target 188 districts/ cities in 2020 have reported contraceptive service results through SIGA (February 2020 data). With that problem, the researcher used a modified model, UTAUT 2 user acceptance to see what factors affect the acceptance of SIGA users. 273 respondent data were processed using the Partial Least Square-Structural Equation Model method. The results show that Performance Expectancy, Effort Expectancy, and Habit influence behavioral intention to use SIGA, while Facilitating Conditions, Habit, and Behavior Intention of SIGA use behavior.