Abstract: A mountaineering self rescue, no moving part, ascender is used in pairs in conjunction with standard mountaineering equipment, to allow a climber to ascend a safety rope without aid, beyond the belaying of the safety rope. This no moving part ascender is simple, light weight, unaffected by ice, and placed in position with one hand. The first embodiment consists of a U shaped housing, whose vertical sides extend horizontally from a vertical curved back. The interior of the curved back is serrated to increase friction and is placed to partially surround a belayed climbing or safety rope, defining a travel path for this rope. The oppositely spaced apart vertical sides, each have a mirror image longitudinal bias slot. Carabiners, with attached sling ropes, already carried by mountaineers, are snapped into the bias slots of the ascender.