Skyhawk 172/Cutlass 172
Flight Crew Commercial; Flight Crew Flight Instructor
Flight Crew Last 90 Days 60; Flight Crew Total 550; Flight Crew Type 525
Conflict NMAC; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural FAR
Flight Crew Took Evasive Action
Human Factors; Procedure
While on downwind for Runway XX at ZZZ; I heard a twin-engine Cessna announce he was departing westbound before takeoff on Runway XX. The offending aircraft took off; then turned west before reaching pattern altitude and cut across downwind leg (Runway XX) at pattern altitude between two other aircraft. I estimate that the offending aircraft missed my aircraft by approximately 300 ft.
Pilot reported a near mid air collision while conducting flight training in the VFR traffic pattern.