Boris Efimovich Serebryakov (born August 18, 1941 in Malgobek, Chechen-Ingush ASSR - 1971 in Syzran Prison), known as the "Kuybyshev Monster", was a Soviet serial killer and mass murderer who operated in Kuybyshev (present-day Samara).
He killed 9 people with special cruelty, caused two people serious bodily injury, and more than a dozen victims received from mild to moderate psychological disorders.