Police said the deceased, who has not been identified, was in an inebriated condition.
They said a passerby informed them about the suicide yesterday in Al Majaz area of Sharjah.
A team comprising forensic experts, CID officers and paramedics rushed to the scene and found the man lying in a pool of blood, Khaleej Times reported.
Police are questioning the acquaintances of the deceased to ascertain the reason for the suicide.