Khem Raj Bhatta Mayalu is a Nepalese politician and a member of the Nepali Congress (Democratic) party. During the panchayat regime he was the general secretary of the underground leftist group Nepal Janabadi Morcha (NJM), living in exile in Lucknow, India. After the 1985 bombings, which NJM had claimed responsibility for, Mayalu was awarded a life sentence.
In the 1994 legislative elections Mayalu was the candidate of NJM in the Dadeldhura constituency. Mayalu came second with 9966 votes; the seat was won by Sher Bahadur Deuba of Nepali Congress with 20701 votes.
Later Mayalu joined the Nepali Congress; he won the Bardia 3 seat in the 1999 legislative elections as a Nepali Congress candidate. He got 15574 votes.
On February 23, 2001, Maoists attacked Mayalu's residence in Guleriya. In total Maoists have seized 15 bighas (10.1 hectares or 25 acres) of land belonging to Mayalu.
When Sher Bahadur Deuba split away from Nepali Congress and formed Nepali Congress (Democratic), Mayalu followed him. On October 18, 2001, Mayalu was named Minister of General Administration in Deuba's cabinet.
Mayalu was arrested on March 8 and later on May 29, 2005 following crack-downs on prodemocracy protests.