The duration of labor can cause maternal death due to infection, exhaustion, dehydration, and postpartum hemorrhage. In the fetus, there will be infection, injury, and aphasia which can increase infant mortality. Extension of the first stage of the active phase is one of the problems that often occur in the labor process, especially in primigravida. In primigravida physiologically the labor process takes longer than multiparas. The purpose of this study was to describe the duration of active phase 1 labor in primigravida and multigravida. The design in this study used a descriptive research type of research design. The population in this study were all mothers giving birth from May up to September 2021 at the Public health center UPTD Nguling, Pasuruan Regency, totaling 58 people. This study used a sampling technique non-probability sampling purposive sampling type. The sample size that meets the research criteria is 50 people. The instrument used in this study was a partograph observation sheet. The analysis in this study is descriptive. The results of this study were most of the respondents aged 20-35 years, as many as 37 people (74%), most of the respondents were primigravida based on the duration of labor in the 1st stage of active phase 6-7 hours as many as 18 people (64,3%). Meanwhile, for multigravida respondents based on the duration of labor in the first stage of the active phase of 6-7 hours as many as 12 people (54,5%). This is because in primigravida cervical effacement occurs first before opening, while in multipara the cervix has softened due to previous labor so that the first stage period in primigravida is longer than in multigravida. And for the age of 20-35 years at the time of pregnancy, not too young and not too old is the age that is considered the safest to undergo pregnancy and childbirth.