The International Mass Spectrometry Foundation (IMSF) is a non-profit scientific organization in the field of mass spectrometry.

[1] It operates the International Mass Spectrometry Society, which consists of 37 member societies and sponsors the International Mass Spectrometry Conference that is held once every two years.

[2] The foundation has four aims:[3] Before the formation of the IMSF, the first International Mass Spectrometry Conference was held in London in 1958 and 41 papers were presented.

[3] Conference proceedings are published in a book series, Advances in Mass Spectrometry, which is the oldest continuous series of publications in mass spectrometry.

The IMSF was officially registered in the Netherlands in 1998 following an agreement at the 1994 conference.