The rufous-bellied niltava (Niltava sundara) is a species of bird in the family Muscicapidae.
It is found in Bangladesh, Bhutan, China, India, Laos, Myanmar, Nepal, Pakistan, Thailand, and Vietnam. Its natural habitats are subtropical or tropical moist lowland forest and subtropical or tropical moist montane forest.
Rufous-bellied niltava measures 15β18 cm and weighs 19β24 g. It is a large, stocky and brightly coloured flycatcher with rounded head shape, fairly short tail and broad-based bill.