After being out of contract this summer, Jellyman has agreed to stay on at Field Mill.
Stags boss Billy Dearden was delighted that the left back/midfielder has agreeed to sign back on for the club.
"Gareth has agreed to come back on a smaller basic wage which, in this day and age, is superb," Dearden told the Mansfield CHAD "It shows his commitment to this club.
"His signing is as important as the other two I've made this week."