Lejb (Lutek) Rotblat (October 14, 1918 – May 8, 1943) was an activist of the Jewish resistance movement in the Warsaw Ghetto, a member of Jewish Combat Organisation (ŻOB), and a participant in the Warsaw Ghetto Uprising.

During World War II he joined the Zionist Bnei Akiva youth movement.

When the deportation to Treblinka extermination camp took place in the summer of 1942, Rotblat and his mother, director of an orphanage at 18 Mylna Street, hid a group of Jewish children in one of the houses in the ghetto.

Rotblat is buried in a mass grave along with other deceased ŻOB fighters in the place where they perished, as no exhumation was ever conducted.

The name of Lutek Rotblat is engraved on the obelisk, set at the steps of the memorial known as Anielewicz Mound in 2006.