Arunagirinathar was a Tamil poet who lived during the 15th century in Tamil Nadu, India. He was the creator of Tiruppugazh, a book of poems in Tamil in praise of the Hindu God Murugan.

The Thiruppugazh composed by him, consisted of 16,000 songs, of which only about 1,365 has been traced. His poems are known for their lyricism coupled with complex rhymes and rhythmic structures. In Thiruppugazh, the literature and devotion has been blended harmoniously.

Thiruppugazh is one of the major works of medieval Tamil literature, known for its poetical and musical qualities, as well as for its religious, moral and philosophical content.