This paper studies how gender-biased technological change in agriculture affected women’s work in 20th-century Norway. After WWII, dairy farms began widely adopting milking machines to replace the hand milking of cows, a task typically performed by young women. We show that the adoption of milking machines pushed young rural women out of farming in dairy-intensive municipalities. The displaced women moved to cities where they acquired more education and found better-paid employment. Our results suggest that the adoption of milking machines broke up allocative inefficiencies across sectors, which improved the economic status of women relative to men.