A softbox speedring having a fitting assembly structure for a photograph or an image, the speedring comprising: a speedring body including a central hole formed at a center of the speedring body , a plurality of adaptor inserting holes formed along an outer circumferential surface of the speedring body , and rotational shaft seating grooves formed in first perpendicular surface and second perpendicular surface of each adaptor inserting hole ; and an adaptor including a head part including rotational shafts protruding from opposite perpendicular surfaces of the head part to be fitted into and assembled with the rotational shaft seating grooves , and a body part provided at a lower portion of the head part and including a pole inserting part formed in a lower end of the body part , characterized in that the speedring body further includes: an adaptor mounting member that is provided on an inner perpendicular surface of the adaptor inserting hole , is formed in a structure of a disk, and includes the rotational shaft seating groove formed in a center of the disk and a rotational shaft introducing port formed at an upper portion of the disk to be open to communicate with the rotational shaft seating groove , and wherein the adaptor includes a locking plate protruding along an edge of the head part to prevent the adaptor from deviating from an upper portion of the speedring body . a speedring body including a central hole formed at a center of the speedring body , a plurality of adaptor inserting holes formed along an outer circumferential surface of the speedring body , and rotational shaft seating grooves formed in first perpendicular surface and second perpendicular surface of each adaptor inserting hole ; and an adaptor including a head part including rotational shafts protruding from opposite perpendicular surfaces of the head part to be fitted into and assembled with the rotational shaft seating grooves , and a body part provided at a lower portion of the head part and including a pole inserting part formed in a lower end of the body part , characterized in that the speedring body further includes: an adaptor mounting member that is provided on an inner perpendicular surface of the adaptor inserting hole , is formed in a structure of a disk, and includes the rotational shaft seating groove formed in a center of the disk and a rotational shaft introducing port formed at an upper portion of the disk to be open to communicate with the rotational shaft seating groove , and wherein the adaptor includes a locking plate protruding along an edge of the head part to prevent the adaptor from deviating from an upper portion of the speedring body . an adaptor mounting member that is provided on an inner perpendicular surface of the adaptor inserting hole , is formed in a structure of a disk, and includes the rotational shaft seating groove formed in a center of the disk and a rotational shaft introducing port formed at an upper portion of the disk to be open to communicate with the rotational shaft seating groove , and wherein the adaptor includes a locking plate protruding along an edge of the head part to prevent the adaptor from deviating from an upper portion of the speedring body . <EOS>