In a signal recording and/or reproducing device having a chassis, a read/write head assembly includes a read/write head for sliding in contact with a surface of a moving flexible recording medium and for reading information from and writing information onto the surface of the moving flexible recording medium, and a head supporting plate for elastically supporting the read/write head. The head supporting plate includes a first supporting frame for mounting the read/write head, a second supporting frame elastically connected to the first supporting frame by a first pair of tie bar portions, and a third supporting frame for fixing the head supporting plate to the chassis of the recording and/or reproducing device. The third supporting frame is elastically connected to the second supporting frame by a second pair of tie bar portions. Connecting points between the first pair of tie bar portions and the first supporting frame mounting the read/write head are disposed nearer a trailing side of the read/write head with respect to a direction of movement of the recording medium than connecting points between the first pair of tie bar portions and the second supporting frame.