Sports boot having a transversely adjustable tightening device

A sports boot, such as a ski boot, comprising:

• a foot insertion area, a pair of flaps at said foot insertion area, and a tightening device, to be latched and unlatched, adapted to keep said two flaps close together;
• said tightening device comprising:
• a first portion including an operating lever comprising at least one connection element, a plate carrying said connection element, said plate being affixed to a first of said two flaps;
• and
• a second portion located on a second of said two flaps, said second portion comprising a second connection element corresponding to said first connection element and controlled during said latching and unlatching by means of said lever which comprises a structure to align said first and second portions so as to position said first and second portions on a single working line, said operating lever being attached on said plate, which is fixed, by means of a movable cap forming a base connected to said plate by at least one assembling and guiding pin extending through a corresponding hole of said cap and an arc of a circle slot of said plate in which at least one pin is adapted to move angularly, in a transverse direction, when adjusting the alignment of the portions of said tightening device, which occurs by sliding said cap carrying said lever with respect to said base plate.