Shashikant Kadam, charged with abetting the suicide of his wife and subjecting her to cruelty, was let off by Thane Sessions Judge S J Kale for want of sufficient evidence.
According to the prosecution, the 38-year-old worker's wife Trupti strangled her two children, aged four and one, to death and then committed suicide by hanging herself at her residence on September 5, 2006.
The 35-year-old homemaker took the extreme step as she was allegedly unable to bear the torture meted out by her husband, it said.
The couple was residing with their son Avadut (4) and daughter Ridhi (1) in Sanpada area of Navi Mumbai.