Why not to take a look on old leaders, and chronology? Prime Ministers: Padma Shamshir Jang Bahadur Rana 29 Nov 1945 - 30 Apr 1948 (+1948) Mohan Shamshir Jang Bahadur Rana 30 Apr 1948 - 12 Nov 1951 (+1967) Matrika Prasad Koirala 16 Nov 1951 - 14 Aug 1952 (+1997) - King Tribhuvana's rule - 14 Aug 1952 - 15 Jun 1953 (+1955) Matrika Prasad Koirala 15 Jun 1953 - 14 Apr 1955 (+1997) - King Mahendra's rule - 14 Apr 1955 - 27 Jan 1956 (+1972) Tanka Prasad Acharya 27 Jan 1956 - 26 Jul 1957 (+1992) Kunwar Indrajit Singh 26 Jul 1957 - 15 Nov 1957 (+1982) - King Mahendra's rule - 15 Nov 1957 - 15 May 1958 (+1972) Subarna Shamshir Jang Bahadur Rana 15 May 1958 - 27 May 1959 (+1977) Bishewar Prasad Koirala 27 May 1959 - 26 Dec 1960 (+1982) - King Mahendra's rule - 26 Dec 1960 - 2 Apr 1963 (+1972) Tulsi Giri 2 Apr 1963 - 23 Dec 1963 Surya Bahadur Thapa 23 Dec 1963 - 26 Feb 1964 Tulsi Giri 26 Feb 1964 - 26 Jan 1965 Surya Bahadur Thapa 26 Jan 1965 - 7 Apr 1969 Kirti Nidhi Bista 7 Apr 1969 - 13 Apr 1970 - King Mahendra's rule - 13 Apr 1970 - 14 Apr 1971 (+1972) Kirti Nidhi Bista 14 Apr 1971 - 16 Jul 1973 Nagendra Prasad Rijal 16 Jul 1973 - 1 Dec 1975 (+1994) Tulsi Giri 1 Dec 1975 - 12 Sep 1977 Kirti Nidhi Bista 12 Sep 1977 - 30 May 1979 Surya Bahadur Thapa 30 May 1979 - 12 Jul 1983 Lokendra Bahadur Chand 12 Jul 1983 - 21 Mar 1986 Nagendra Prasad Rijal 21 Mar 1986 - 15 Jun 1986 Marich Man Singh Shrestha 15 Jun 1986 - 6 Apr 1990 Lokendra Bahadur Chand 6 Apr 1990 - 19 Apr 1990 Krishna Prasad Bhattarai 19 Apr 1990 - 26 May 1991 Girija Prasad Koirala 26 May 1991 - 30 Nov 1994 Man Mohan Adhikari 30 Nov 1994 - 12 Sep 1995 (+1999) Sher Bahadur Deuba 12 Sep 1995 - 12 Mar 1997 Lokendra Bahadur Chand 12 Mar 1997 - 7 Oct 1997 Surya Bahadur Thapa 7 Oct 1997 - 15 Apr 1998 Girija Prasad Koirala 15 Abr 1998 - 31 May 1999 Krishna Prasad Bhattarai 31 May 1999 - 22 Mar 2000 Girija Prasad Koirala 22 Mar 2000 - 26 Jul 2001 Sher Bahadur Deuba 26 Jul 2001 - 4 Oct 2002 - King Gyanendra's rule- 4 Oct 2002 - 11 Oct 2002 Lokendra Bahadur Chand 11 Oct 2002 - 4 Jun 2003 Surya Bahadur Thapa 4 Jun 2003 - 3 Jun 2004 Sher Bahadur Deuba 3 Jun 2004 - 1 Feb 2005 - King Gyanendra's rule- 1 Feb 2005 - 30 Apr 2006 Girija Prasad Koirala 30 Apr 2006 - (Source: Rulers, by Ben Schemmel)