None of the students of the state-run primary school in Bankura, 220 kilometres from state capital Kolkata, fell ill and they have returned home, an official said.
The lizard was found in the mid-day meal plate of a student of Mandarmani primary school in the district on Friday afternoon.
"There was panic among the students after a dead lizard was found in one of their classmates' food... The district administration and school authorities took them to the local hospital immediately for check-up, but none was found ill," said Monirul Islam, Block Medical Officer.
"Most of the students were released immediately after check-up. Two or three of them were kept in the hospital overnight under observation. However, all of them were released today (Saturday)," said Mr Islam, also the Superintendent of Onda Super-Specialty Hospital.
Police also said none of the students fell ill.