Alnur Aljapparuly Mussayev (Kazakh: Әлнұр Әлжаппарұлы Мұсаев, Älnūr Äljapparūly Mūsaev; born 4 January 1954; Lugovoye, Lugovsky District, Dzhambul Region, Soviet Union) was the former head of Kazakhstan's National Security Committee (KNB) under the tenure of President Nursultan Nazarbayev.

He served from May 1997 to September 1998, then returned for a second term from August 1999 to May 2001 after his predecessor Nurtai Abykayev was sacked in a scandal over the sale of old MiG fighter planes to North Korea.

[3] Mussayev accused the government of widespread corruption and payments of millions of dollars in bribes by western oil companies to President Nazarbayev.

[3] In a January 2010 trial, defendant Ildar A., one of three men charged with the kidnap attempt on Mussayev, was found not guilty by an Austrian court.

[6] The primary suspect in the case, Rakhat Aliyev, was found hanged in his prison cell before the trial began.