Monier Ventilation Shaft 2 is a heritage-listed ventilation shaft at 134 St Paul's Terrace, Spring Hill, City of Brisbane, Queensland, Australia. It was designed by Joseph Monier and built c. 1904. It was added to the Queensland Heritage Register on 4 August 1998.

The Monier Ventilation Shafts are thought to have been constructed c. 1904, as part of a system of ventilation shafts (either concrete or steel/iron) located at intervals along some of Brisbane's inner city arterial stormwater drains. Three concrete shafts survive (of at least five erected) and may be the first pre-cast reinforced concrete structures in Queensland.