Arunachalam Muruganantham (Padman) (born 12 October 1961[1]) is a social entrepreneur from Coimbatore in Tamil Nadu, India. He is the inventor of a low-cost sanitary pad-making machine and is credited for innovating grassroots mechanisms for generating awareness about traditional unhygienic practices around menstruation in rural India. His mini-machines, which can manufacture sanitary pads for less than a third of the cost of commercial pads, have been installed in 23 of the 29 states of India.