The General Electric CF34 is a civilian high-bypass turbofan developed by GE Aviation from its TF34 military engine.

The CF34 is used on a number of business and regional jets, including the Bombardier CRJ series, the Embraer E-Jets, and Comac ARJ21.

The original engine contained a single stage fan driven by a 4-stage low pressure (LP) turbine, supercharging a 14-stage high pressure (HP) compressor driven by a 2-stage HP turbine, with an annular combustor.

Later higher thrust versions of the CF34 feature an advanced technology core, with only 10 HP compressor stages.

Latest variants, the -10A and -10E, were derived from the CFM56 engine family,[citation needed] and have a radically different HP spool, containing a 9-stage compressor driven by a single stage turbine.