Nacionalni inštitut za biologijo (NIB) je tretji največji javni raziskovalni zavod na področju naravoslovnih ved v Sloveniji in predstavlja najprodornejše in najsodobnejše raziskovalne potenciale v osnovnih in uporabnih bioloških raziskavah.
Osrednjo dejavnost Nacionalnega inštituta za biologijo predstavljajo temeljne in aplikativne raziskave, le-te pa so vsebinsko usmerjene na različna področja biologije in medicine. Raziskave pretežno financira Javna agencija za raziskovalno dejavnost Republike Slovenije (ARRS) prek programa ter temeljnih in aplikativnih projektov. S svojimi raziskavami smo raziskovalci NIB vključeni tako v raziskovalne projekte EU, kot tudi v projekte dvostranskih sodelovanj. Vse večji naših raziskav pa je uporabnih. S pogodbenimi projekti namreč sodelujemo tudi z industrijo, predvsem s farmacevtsko in prehrambeno. Zelo pomembna vzporedna dejavnost inštituta je tudi izobraževanje mladih raziskovalcev.

The National Institute of Biology (NIB) was established by the Republic of Slovenia as a public, non-profit research institute in 1960. Since then it has undergone very dynamic development, resulting in its emergence as an institute with internationally comparable research potential.
The core work of the National Institute of Biology is in basic and applied research. This takes place in various areas of biology (ecology, plant and animal physiology, etc.) and medicine (molecular and genetic research). The applied research is an extension of the basic research and is focused predominantly on protection of the environment, biotechnology and agriculture. The research is funded from public funds and by various users and donors. The NIB also participates in various undergraduate and, especially, postgraduate programmes of the Slovenian universities and faculties.