An operating device includes: an operating section that rotates about a predetermined axis; and a shaft part to move integrally with the operating section. The shaft part has a first end and a second end projected in directions opposite from each other along the axis. A guide regulates movement of the shaft part in a radial direction. A first regulation part specifies a position of the shaft part in a thrust direction by contacting the first end of the shaft part. A second regulation part is press-contacted to the second end, such that the first end of the shaft part is made to contact the first regulation part. A locking part is arranged integrally with the second regulation part, and restricts the shaft part from separating from the guide, by contacting the second end.

An operating device includes: an operating section that rotates about a predetermined axis; and a shaft part to move integrally with the operating section. The shaft part has a first end and a second end projected in directions opposite from each other along the axis. A guide regulates movement of the shaft part in a radial direction. A first regulation part specifies a position of the shaft part in a thrust direction by contacting the first end of the shaft part. A second regulation part is press-contacted to the second end, such that the first end of the shaft part is made to contact the first regulation part. A locking part is arranged integrally with the second regulation part, and restricts the shaft part from separating from the guide, by contacting the second end.

A keyboard including: an inner thumb row including a plurality of inner thumb keys configured to be actuated by a thumb, such that a critical contact point of each of the plurality of keys is arranged along an inner thumb arc on an inner thumb key plane; and an outer thumb row including a plurality of outer thumb keys configured to be actuated by the thumb, a critical contact point of each of the plurality of thumb keys is arranged along an outer thumb arc on a outer thumb key plane, wherein the first and the second thumb key planes are non-coplanar, such that, when the keyboard is in use, said thumb key planes intersect with each other and a palm plane, where the palm plane is the plane upon which a user's palm lies when the keyboard is in use.