Synthetic resin container closure

A synthetic resin container closure to be applied to a container in which an external thread and an engaging jaw portion located below the external thread are formed on an outer peripheral surface of a mouth-and-neck portion,

• the synthetic resin container closure including
• a body which has a top panel wall, and a cylindrical skirt wall extending downwardly from a peripheral edge of the top panel wall, and in which an internal thread to be screwed to the external thread is formed on an inner peripheral surface of the skirt wall, and
• a cylindrical tamper evident bottom portion which is connected to the skirt wall of the body via a plurality of breakable bridge portions arranged with spacing in a circumferential direction, and in which engaging means to be engaged with the engaging jaw portion is disposed on an inner peripheral surface of the tamper evident bottom portion,
• wherein a protruding piece protruding downward is disposed on the skirt wall of the body, and
• unbroken connecting pieces are disposed on both sides in the circumferential direction of the protruding piece,
• the unbroken connecting pieces connecting the skirt wall of the body and the tamper evident bottom portion, and each having a tilting portion whose inclination angle with respect to a vertical line is gradually decreased when the body is moved upward with respect to the tamper evident bottom portion,
• characterized in that each of the unbroken connecting pieces includes two of the tilting portions whose tilting directions are opposite to each other.