Control apparatus and control method for a gear change device

One of two clutches, etc., which are engaged with each other at the same time to realize a second gear, a third gear or fourth gear is previously determined as an abnormal-held engaged when an abnormality occurs in the other coupling or brake during concurrent engagement of the two clutches, etc. is engaged. The other element of the two clutches etc. is previously determined as an abnormal-that is caused to slip when such abnormality occurs. During the simultaneous engagement of the two clutches, etc., a hydraulic pressure (reference hydraulic pressure) to be supplied to the abnormal-set higher than a hydraulic pressure (reference hydraulic pressure) to be supplied to the abnormal-(see steps S140 and S150).