Mahatma Gandhi's campaign against untouchability was a crucial element of his broader Constructive Programme, aimed at transforming Indian society through non-violent means. This article examines Gandhi's approach to eradicating untouchability, which he regarded not merely as a social evil but as a fundamental obstacle to India’s moral and spiritual regeneration. Through his Constructive Programme, Gandhi sought to uplift the Harijans (a term he coined for the untouchables, meaning “children of God” ) by advocating for their social inclusion, education, and access to public facilities. This article explores how Gandhi’s commitment to the eradication of untouchability became a cornerstone of his efforts to foster a just and equitable society, highlighting his belief that “untouchability is a sin,” and analysing its impact on the Indian independence movement.