A dolly comprising a body (1, 2) for carrying goods and wheels allowing transportation of the dolly mounted on the body, the dolly being equipped with a coupling arrangement, the coupling arrangement comprising a female connecting part and a male connecting part, wherein: - the male connecting part comprises a draw bar and a connecting peg, - female part comprises: ∘ a sliding surface, that is larger than the largest cross section of the connecting peg, for easy positioning of the connecting peg, ∘ a guide surface (15 - 18) at least partially surrounding the sliding surface for guiding the connecting peg when pulled towards the guide surface, and ∘ an opening in the sliding surface dimensioned to contact with the connection peg and positioned in connection with the guide surface (15 - 18) so that the peg can be directed to the opening by the guide surface (15 - 18), and wherein: - the female connecting part of the coupling arrangement is arranged wholly under the frame or body (1, 2) of the dolly, and - the draw bar is mounted on the dolly at the centre of one short wall of the body (1, 2) by a rotary axle, which comprises a spring arranged to turn and hold the draw bar to upright position. - the male connecting part comprises a draw bar and a connecting peg, - female part comprises: ∘ a sliding surface, that is larger than the largest cross section of the connecting peg, for easy positioning of the connecting peg, ∘ a guide surface (15 - 18) at least partially surrounding the sliding surface for guiding the connecting peg when pulled towards the guide surface, and ∘ an opening in the sliding surface dimensioned to contact with the connection peg and positioned in connection with the guide surface (15 - 18) so that the peg can be directed to the opening by the guide surface (15 - 18), and wherein: - the female connecting part of the coupling arrangement is arranged wholly under the frame or body (1, 2) of the dolly, and - the draw bar is mounted on the dolly at the centre of one short wall of the body (1, 2) by a rotary axle, which comprises a spring arranged to turn and hold the draw bar to upright position. ∘ a sliding surface, that is larger than the largest cross section of the connecting peg, for easy positioning of the connecting peg, ∘ a guide surface (15 - 18) at least partially surrounding the sliding surface for guiding the connecting peg when pulled towards the guide surface, and ∘ an opening in the sliding surface dimensioned to contact with the connection peg and positioned in connection with the guide surface (15 - 18) so that the peg can be directed to the opening by the guide surface (15 - 18), and wherein: - the female connecting part of the coupling arrangement is arranged wholly under the frame or body (1, 2) of the dolly, and - the draw bar is mounted on the dolly at the centre of one short wall of the body (1, 2) by a rotary axle, which comprises a spring arranged to turn and hold the draw bar to upright position. - the female connecting part of the coupling arrangement is arranged wholly under the frame or body (1, 2) of the dolly, and - the draw bar is mounted on the dolly at the centre of one short wall of the body (1, 2) by a rotary axle, which comprises a spring arranged to turn and hold the draw bar to upright position.