Butterfly valve

A butterfly valve comprising

• a valve body formed therein with an internal flow passage,
• a valve stem rotatably supported by the valve body,
• a valve element placed in the internal flow passage and supported by the valve body via the valve stem to be rotatable about a rotation axis, and
• a bushing externally fitted around the valve stem, wherein
• the valve element is configured by a core member and a contour member,
• said contour member formed of a resin material and surrounding the core member to define a contour of the valve element, and
• said valve element formed with a valve-stem hole that supports at least a part of the valve stem via the bushing;
• the contour member has a stem hole component forming at least a portion of an inner peripheral surface of the valve-stem hole;
• and
• a gap is formed over an entire region of the stem hole component along the rotation axis between an inner peripheral surface of a portion of the bushing located inside the stem hole component and an outer peripheral surface of a portion of the valve stem located inside the stem hole component.