Arachalur Rock-cut Cave Musical Inscription, also known as Arachalur Isai Kalvettu is a rock cut historical site of musical inscriptions at the south of Nagamalai hill in Arachalur Reserve Forest near Erode in Tamil Nadu, India.

[1][2] There are three 2nd century CE Jain inscriptions in Arachalur, which Dr. S. Raju discovered.

On a Jain bed in the Arachalur hills, is an inscription — ‘ezhuthum punaruthan maniya vannakkan devan sathan.’ The word ‘punaruthan’ is an alteration of punarthan, which means organised.

These two inscriptions show that 'Maniyan Vannakkan Devan Sathan' organised musical syllables.

[3][5] The site is located on the Erode-Palani State Highway-83A about 20 km from Erode Central Bus Terminus and 18 km from Erode Junction railway station.