A disc brake device is characterized by including a disc rotor that rotates around a rotational axis, a friction pad that opposes a friction surface of the disc rotor, a first member provided on a fixed portion on a vehicle body side, a second member that is slidably supported via a slide mechanism with respect to the first member, and a third member that holds the friction pad, and is pivotally supported, with a pivot axis along a radial direction of the disc rotor as a pivot center, via a pivot mechanism with respect to the second member.