Hans Gerald Nagler (10 December 1929 – 23 July 2022[1][2]) was a Swedish businessman and human rights activist.

He worked in, and later took over, the wholesale and import company for instruments and optical equipment founded by his father.

In 1977, at the invitation of Morton Narrowe, he went to the Soviet Union to make contact with Andrei Sakharov, Yelena Bonner, Naum Meiman, Alexander Lerner and other Russian dissidents (refusniks).

He then founded the Swedish Helsinki Committee for Human Rights in 1982 and was its Chairman from 1992 to 2004.

Nagler also co-founded the International Helsinki Federation for Human Rights in 1984 and was its first Secretary General in Vienna from 1984 to 1992.