Ladislav Hejdánek was a Czech philosopher and a proponent of Charter 77.
He was born in Prague and graduated from the Charles University in Prague.
In 1952 he attained a degree in philosophy for a dissertation "Truth and its ontological premisses".
During the period of 1956-68 he worked at Prague Institute of Epidemiology and Microbiology.
Then he took a position at the Institute for Philosophy of the Czechoslovak Academy of Sciences, but was expelled in 1971.
In 1985, Ladislav Hejdánek established the journal Reflexe. Časopis pro filosofii a teologii.
In 1990, he was habilitated at the Charles University in Prague, and two years later became a professor of that university.
He later became chairman of the Unity of Philosophy and then Chairman of the Emanuel Rádl Foundation.