The incident happened around 2am in a building situated in the Pasaje de Can Curt in Palma.
The National Police are investigating the circumstances of the fall.
The boy, who remained conscious through his ordeal, suffered a broken leg, which required an operation.
Neighbours allegedly told the police that there had been a party going on at the flat from which the child fell, and there was loud music.
The child fell on to a car parked outside the building.
A family member said that another relative who was in the street at the time had tried to catch the child.
The content of comment is the opinion of users and netizens and not of mallorcadailybulletin.com.
Comments contrary to laws, which are libellous, illegal or harmful to others are not permitted');
mallorcadailybulletin.com - reserves the right to remove any inappropriate comments.