The slender broad-nosed bat (Platyrrhinus angustirostris) is a species of bat in the family Phyllostomidae. As a phyllostomid bat, it is characterized by a narrow uropatagium which is fringed with hair; a white dorsal stripe; large inner upper incisors convergent at the tips; and three upper and three lower molars. It is found in eastern Colombia and Ecuador, north-eastern Peru, and Venezuela. It is closely related to Platyrrhinus incarum and Platyrrhinus fusciventris.