To secure a sufficient braking force by generating a new braking force in addition to a friction braking force in a power transmission controller of a vehicle using a double clutch transmission.

Normal control is usually executed while the vehicle is running (before time t2). In the normal control, a selection clutch is controlled to an engagement state while a selection shift stage is established in a selection mechanism part (Tc1>0), and a non-selection clutch is controlled to a disengaged state while an adjacent shift stage is established in a non-selection mechanism part (Tc2=0). Meanwhile, when sudden braking is applied or when braking is determined as being abnormal, special control is started and performed in place of the normal control (after time t2). In the special control, the selection clutch is controlled to the engagement state while the selection shift stage is established in the selection mechanism part (Tc1>0), and the non-selection clutch is also controlled to the engagement state while the adjacent shift stage is established in the non-selection mechanism part (Tc2>0).