The Indian roundleaf bat (Hipposideros lankadiva), also known as the large Ceylon leaf-nosed bat or Kelaart's leaf‐nosed bat is a species of bat in the family Hipposideridae. It is endemic to the Indian subcontinent, with marginal populations also detected in Southeast Asia. Its natural habitats are subtropical or tropical dry forests and caves. The bat has three subspecies that occur in India, Sri Lanka, and Myanmar. The Indian subspecies, H. l. indus, is smaller than the ones found in Sri Lanka and Myanmar, although there are no other characteristics that differentiate the subspecies.

H. lankadiva is a large leaf-nosed bat and is yellowish-brown in color. A key trait of the bats is the reduced fourth supplementary leaflet on the noseleaf, along with a lack of a fleshy elevation behind the posterior nose-leaf and the absence of white patches on the shoulders, which helps differentiate from similar species such as H. armiger and H. diadema.

The bat has been assessed by the IUCN as least concern, although the species is threatened in parts of its range by roost disturbance and collection for consumption and medicinal use.

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