Tiếng gọi thanh niên, or Thanh niên hành khúc (Saigon: [tʰan niəŋ hân xúk], "March of the Youths"), and originally the March of the Students (Vietnamese: Sinh Viên Hành Khúc, French: La Marche des Étudiants), is a famous song of the Vietnamese musician Lưu Hữu Phước.

This move was strongly protested by the original author Lưu Hữu Phước, who was culture minister of the Việt Cộng-led Provisional Revolutionary Government during the Vietnam War.

The first verse was written by Lưu Hữu Phước and Mai Văn Bộ in 1941, and secretly spread until 1945, the second verse (Tiếng Gọi Sinh Viên, Call to the Students) was written by Lê Khắc Thiều and Đặng Ngọc Tốt in late 1941, and published in 1943, the third verse was written by Hoàng Mai Lưu on April 4, 1945, and published before the August Revolution.

The lyrics of Thanh Niên Hành Khúc were revised by former President Ngo Dinh Diem in 1956.

Anti-communist refugees and expatriates continued to use the revised version and dubbed it as "Anthem of Free Vietnam".