A female element for a coupling that includes a body having a duct for receiving a male element along a coupling axis (X-X′) and a locking member including a locking portion, a connecting portion, and a control portion, wherein the locking member extends along the axis (X-X′) and is movable between a locked and an unlocked position, and wherein an annular element moves the locking member from the locked to the unlocked position and a resilient member urges the locking member to the locked position, and the female element includes a lateral guide for the connecting portion and the control portion, and a surface of the locking portion that is to come into contact with the male element generally having a shape of a portion of a surface of revolution and a width, in a circumferential direction, that is greater than a width of the control portion and the connecting portion.