To provide a hydraulic pressure type damper capable of surely eliminating any plays between component members even when a spherical bearing is used on a connecting part with a building structure.

In this hydraulic pressure type damper using the spherical bearing 70 on the connecting part with the building structure 57, an outer face of a bearing outer ring member 79 of the spherical bearing 70 and an inner face of an outer ring supporting member 77 kept into contact with the outer face to support the bearing outer ring member 79 respectively have the taper shape corresponding to each other. As the play between the members of the spherical bearing and the like can be surely eliminated, the hydraulic pressure type damper can generate the damping force from the beginning even when the reciprocating external force of small amplitude such as swinging by wind is added, which prevents a person from feeling the uncomfortable swing. Further a deterioration in performance to reduce the external force, of the hydraulic pressure type damper in earthquake and the like can be prevented.