Abu'l-Fath Ali ibn Muhammad ibn al-Hussain ibn Yusuf ibn Muhammad ibn Abd al-Aziz al-Busti, also known as Abu al-Fath al-Busti (942 – 1010) was a Persian secretary and famous poet of the Arabic and Persian language. He served in the chancery of the Ghaznavid Amirs Sabuktigin and his son and successor Mahmud of Ghazni.