Dissapointing the Bury fans, Garner turned down an offer of a new contract with the Shakers for what was described by the Bury manager as a "fantastic" offer from the Orient .
Garner, 28, made 144 appearances for Bury after taking over from Paddy Kenny, following the latter's departure to Bramall Lane, and became a highly rated keeper reportedly on the verge of a Welsh cap.
Orient boss Martin Ling said, "He's a big commanding keeper who is widely rated as one of the best in the lower divisions," adding, "Now that I've got that position sorted I will turn my attentions to filling the other pieces of the jigsaw over the next few weeks."