Earlier, Jha was detained and interrogated by the SIT.
“SIT has arrested Jha on the basis of revelations made by others who have been arrested in connection with the toppers scam,” a police official said.
Jha was produced in a local court that sent him to judicial custody for 14 days.
SIT on Monday had arrested former Board secretary Hariharnath Jha in connection with the scam.
Last week, SIT had arrested the Board’s former chairman Lalkeshwar Prasad and his wife Usha Sinha from Varanasi in Uttar Pradesh.
So far, 20 persons have been arrested in the case, police said.