To determine presence/absence of abnormality of a sensor which detects the rotation speed of a transmission input shaft in the power transmission control device of a vehicle which is applied to a vehicle equipped with an internal combustion engine and a motor as a power source.

The power transmission control device of a vehicle includes a switching mechanism for selecting the connecting state of a motor output shaft to an "IN connecting state" that a power transmission system is formed between a transmission input shaft and a motor output shaft, an "OUT connecting state" that the power transmission system is formed between a transmission output shaft and the motor output shaft, and a "neutral state" that the power transmission system is not formed. The power transmission system is formed between the shaft corresponding to the rotation speed among the rotation speeds of the internal combustion engine output shaft, the motor output shaft and the transmission output shaft and the transmission input shaft, The presence/absence of the abnormality of a sensor which detects the rotation speed of the transmission input shaft based on the comparison result of the sensor detection value of the rotation speed having an already known correlation relation with the rotation speed of the transmission input shaft in a normal time and the sensor detection value of the transmission input shaft.