A retractable flexible handle includes a support (50) with at least one through slot (60), a flexible grip (20) which passes through the at least one slot (60) with a first portion (21) including at least one strap loop (30) cooperating with at least one guide tab (40) arranged at least partially on a side of an inner face (52) of the support (50), and at least one stop, such that the grip (20) is configured to slide between a carrying position in which the at least one strap loop (30) of the first portion (21) of the grip (20) is in contact with the at least one stop, and a retracted position in which the second portion (22) of the grip (20) substantially hugs the outer face (51) of the support (50). A bag including at least one such handle is also described.