Tarsem Chandra Aggarwal (57) was found hanging from a ceiling fan by his wife in their house in Hari Nagar.
In a suicide note, he said he alone was responsible for taking the extreme step, police said.
Aggarwal was injured in a road accident in Punjab about six months ago and had been keeping unwell since then.
As a result, he was depressed, police said adding investigations were on.
