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A 13-year-old boy has been charged with grievous bodily harm after allegedly battering another boy over the head with a skateboard, fracturing his skull.

Police say the incident happened at a skate park at Deception Bay, north of Brisbane, on Thursday afternoon.

The victim was arguing with a third boy when the 13-year-old allegedly struck him in the head with a skateboard.

The injured boy, who is also 13, was taken to the Royal Children's Hospital with a fractured skull and other injuries.

He's since been released from hospital.

Police say the boy who has been charged will be dealt with under the Youth Justice Act.

- AAP