Some Saudis have been asking whether the case amounts to trafficking or child abuse.
Local media reports say the man paid a dowry of $17,000 (£10,500) in order to get married to the girl.
A series of similar cases in recent years has drawn attention to the issue of child marriage in the kingdom.
The girl in the latest case was so frightened that on the wedding night she locked her husband outside the bedroom and eventually escaped back to her parents, local media reports say.
The husband is reported to be considering legal action to get either her or his dowry back.