An opening/closing body stop device of an opening/closing device, comprising: an opening/closing body that performs opening/closing movements; a cord-like member that is joined with said opening/closing body when said opening/closing body comes into contact with an obstacle during a closing movement; a brake device that is turned on by a tensioning force acting on said cord-like member and that stops a closing movement of said opening/closing body; and a pulling device that pulls said cord-like member in a direction that turns on said brake device at the same time when and/or after said opening/closing body comes into contact with said obstacle, wherein said opening/closing body stop device includes a winding device that feedably winds said cord-like member, and said pulling device is configured as a device that causes said winding device, which is a device for feeding said cord-like member during a closing movement of said opening/closing body, to perform an operation to wind said cord-like member, said winding device includes a winding reel (37;637) that feedably winds said cord-like member, and said pulling device is configured as a device that causes said winding reel (37;637) that is a member for feeding said cord-like member during a closing movement of said opening/closing body to perform a pivot to wind said cord-like member and characterised in that said winding device is configured to include a rotate member (35;235;635) that has a plurality of tooth sections (35A;235A;635A) formed in an outer circumferential part thereof and that is joined integrally with said winding reel (37;637), said opening/closing body is provided with an engaging member (51; 251; 650) that engages said tooth sections (35A;235A;635A) of said rotate member (35;235;635) by pivoting around a shaft (50;654), and said winding reel (37;637) is configured to perform a pivot to wind said cord-like member as said engaging member (51; 251; 650) engages said tooth sections (35A;235A;635A) of said rotate member (35;235;635). an opening/closing body that performs opening/closing movements; a cord-like member that is joined with said opening/closing body when said opening/closing body comes into contact with an obstacle during a closing movement; a brake device that is turned on by a tensioning force acting on said cord-like member and that stops a closing movement of said opening/closing body; and a pulling device that pulls said cord-like member in a direction that turns on said brake device at the same time when and/or after said opening/closing body comes into contact with said obstacle, wherein said opening/closing body stop device includes a winding device that feedably winds said cord-like member, and said pulling device is configured as a device that causes said winding device, which is a device for feeding said cord-like member during a closing movement of said opening/closing body, to perform an operation to wind said cord-like member, said winding device includes a winding reel (37;637) that feedably winds said cord-like member, and said pulling device is configured as a device that causes said winding reel (37;637) that is a member for feeding said cord-like member during a closing movement of said opening/closing body to perform a pivot to wind said cord-like member and characterised in that said winding device is configured to include a rotate member (35;235;635) that has a plurality of tooth sections (35A;235A;635A) formed in an outer circumferential part thereof and that is joined integrally with said winding reel (37;637), said opening/closing body is provided with an engaging member (51; 251; 650) that engages said tooth sections (35A;235A;635A) of said rotate member (35;235;635) by pivoting around a shaft (50;654), and said winding reel (37;637) is configured to perform a pivot to wind said cord-like member as said engaging member (51; 251; 650) engages said tooth sections (35A;235A;635A) of said rotate member (35;235;635).