Ramesh Sharma allegedly set ablaze his wife Inder Mani (35) after sprinkling kerosene on her on May 30 following domestic discord.
Mani was brought to the local civil hospital in a critical condition from where the doctors referred her to PGIMS, Rohtak, police said, adding that she succumbed to burn injuries last night.
Police have registered a case of murder against Ramesh on a complaint filed by her brother Om Prakash Sharma, a resident of Jatwara village of Jhajjar district.