Dhaka Women and Children Repression Prevention Tribunal-7 Judge Begum Mosammat Kamrunnahar passed the order at 3pm on Thursday.
The tribunal also fined him Tk 50,000, in default of which, he will suffer six more months in jail.
Earlier on November 12, the same tribunal fixed today for delivering judgement in the rape case.
The tribunal recorded statements of 20 out of 24 prosecution witnesses including the victim and complainant of the case.
On January 5, the DU student was raped while she was walking from Kurmitola bus stop to a friend’s house near Shewra Rail gate in Dhaka around 7:30pm after getting off a university bus.
The next day, the girl’s father filed the case with Cantonment Police Station, accusing unknown people.
Rapid Action Battalion (RAB) arrested 30-year-old Majnu from Shewra area on January 8 and the tribunal framed charges against him on August 26.