The Jordanian Times reported on Wednesday that the body of the 16-year old victim was found stuffed in a canvas bag earlier this week northeast of Zarqa.
The newspaper quoted a senior official saying the victim's brother confessed to the killing "to protect his family's honour because she had been missing on two occasions from home over the last month."
The family took the girl to a medical centre after her first disappearance and subjected her to a virginity test, which came negative.
The victim's brother confessed to the killing ... because she had been missing on two occasions from home over the last month.
A second such test on the victim's body conducted by the coroner also indicated that she was a virgin.
The newspaper said the girl was the ninth victim this year of the so-called honour-killings, where a woman is murdered by a male relative on suspicion of having sullied the family name.
The latest murder came after Jordan's newly-elected parliament earlier this month threw out a temporary law that abolished lighter punishments for those guilty of such killings.
A social analyst told the newspaper that "writing about the deputies rejection of the amendment may have enouraged people" to carry out such crimes.