Abstract: A flexible towing device for single-track vehicles, comprising a towing element adapted for mounting on a first of single-track vehicles and comprising a flexible towing element and a lock attached to one of the ends of the flexible towing element, a locking mechanism assembly adapted for mounting on a second of single-track vehicles and comprising a first portion of the body comprising a half-seat, a second portion of the body comprising a half-seat, which half-seats of the first and the second portion, respectively, form a seat for detachable coupling of the lock of the towing element assembly, wherein the lock of the towing element assembly is releasable from the seat of the locking element mechanism assembly following applying a release force to the lock. A towing element assembly and a locking mechanism assembly for use in the flexible towing device for single-track vehicles.