The Taipei tree frog, Rhacophorus taipeianus, is a species of frog in the Rhacophoridae family endemic to Taiwan. It is a medium-sized tree frog; females are 4.5–5.5 cm (1.8–2.2 in) in snout-vent length, and males are slightly smaller 3.5–4.5 cm (1.4–1.8 in). Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical moist montane forests, swamps, intermittent freshwater marshes, arable land, plantations, ponds, and irrigated land. It is potentially threatened by habitat loss, although its population trend is stable.