The protest rally, which was held in Sanabes Village, a few miles from the capital Manama on Saturday, turned violent after the Al Khalifah regime forces fired tear gas and shotgun pellets to disperse the angry protesters.
Abdul-Aziz al-Abbar, 27, is the latest victim of the regime's deadly crackdown aimed at suppressing voice of dissent.
He died on Friday after 55 days in coma from injuries he suffered during a rally held in late February in Sa’ar, a residential area west of Manama.
Rights campaigners have said that Abbar was hit by a teargas canister and shotgun pellets fired by regime forces at a funeral procession.
One pellet penetrated Abbar's brain and another his eye and he was in a coma in hospital until his death, his family said.
"We have refused to receive the body until we get an (official) report that Abdul-Aziz died from shotgun pellets," Sayed Hassan, Abbar's cousin, told Reuters.
Bahrain's Health Ministry, in its report on the death of Abbar, has said that he died from brain damage and blood flow problems, without specifying what caused this.
Scores of anti-regime protesters have lost their lives and many others put behind the bar in a Saudi-backed military crackdown on pro-democracy rallies in Bahrain since 2011.
All the same, anti-regime protests are held almost on a daily basis across the tiny Persian Gulf monarchy in defiance of the tough security clampdown.