We document characteristics of the previously undescribed nest, nest site, and eggs of the Ochre-breasted Antpitta (Grallaricula flavirostris). We found three nests in 1999 and 2000 in the Talamanca Mountains of southern Costa Rica. The nests were cup shaped and constructed primarily of green moss with linings of thin sticks and black rhizomorphs. Mean nest height above the ground was 3.1 m. Nests were located in the forks of slim saplings in two cases and, in one case, in a larger tree at a point where several smaller branches left the trunk. We observed clutches of one and two eggs. Eggs appeared pale reddish brown with some darker spotting. The incubation period was 17–21 d and we estimate the nestling period lasts 14–16 d.