Ali Hassan Afif Yahya (; born 20 January 1988) is a Qatari footballer. He currently plays for Umm Salal and the Qatar national team as a left-back.
Afif has six siblings. His father, Hassan Afif, is of Somali descent and was born in Moshi, Tanzania. His father previously played for Simba in Tanzania and Horseed in Somalia before relocating to Qatar and playing for Al Ittihad. He was later naturalized. After retiring, he managed Al Gharafa from 1986 till 1987 and Al Markhiya from 2001 till 2003 and 2006 till 2007. His mother, Fayza, comes from Yemen.
He has a brother, Akram Afif, who is also a member of Qatar's football team. He currently plays for Al Sadd.