The number of dead in Indonesia in 2015 reached a high rate, were 305 per 100,000 live births. Maternal deaths that occur in Indonesia are caused by several factors, including long-standing or obstructed labour by 5%. Birth ball is a physical therapy ball that helps with labour and can be used in various positions. One of the exercises in birth ball is to sit on the ball by wiggling your pelvis and is considered to be able to provide comfort and speed up labour. The sitting position above the birth ball, is assumed to be similar to squatting open the pelvis so that it helps accelerate labour. The research method used was a quasiexperimental in two groups, namely the treatment group and the control group with 30 respondents each. Respondents in this study were physiologically pregnant women with a gestational age of more than 34 weeks. The results showed there were differences in the length of labour between the treatment group and the control group. The difference in duration of first stage of labour between the treatment group and the control group is shown by the p-value of 0.002 and RR 1.36. While the difference in the second-stage length in the treatment group compared with the control group is indicated by the p-value of 0.020 and RR 1.33. The conclusion of the study is that there was a significant difference in the length of labour in the first and second stages between the treatment group given birth ball exercises and the control group.