[1] Sarino Mangunpranoto was born on 15 January 1910, in Begelen, Purworejo, Central Java, Dutch East Indies (now Indonesia).

[2][1] Sarino Mangunpranoto became involved in the Struggle for independence, when he joined Partindo, and ran political courses for the movement in Slawi, where Taman Siswa's regional headquarters were located.

During the early Indonesian National Revolution, Sarino played an important role in the establishment of a Republican government in the region.

Sarino was also and active as a member of the Indonesian National Party, founding a branch in Pati and being elected to its central leadership in 1948.

[3] Following the end of hostilities after the Dutch–Indonesian Round Table Conference, he became a member of the Senate of the United States of Indonesia (USI), representing Central Java, under speaker Melkias Agustinus Pellaupessy.