In method and apparatus for engaging an engine clutch for a hybrid transmission, a complete engagement of the engine clutch while at least one of an engine side clutch revolution speed of the engine clutch and a transmission side clutch revolution speed thereof is a revolution speed within a resonance revolution speed region of a revolution transmission system from the engine to a transmission revolution output portion is inhibited and the complete engagement of the engine clutch is carried out when both of the engine side clutch revolution speed of the engine clutch and the transmission side clutch revolution speed thereof become higher than the revolution speed within the resonance revolution speed region.