An LNG truck comprising: - a chassis having a front part for supporting a driver's cab and a rear part for supporting a cargo body; - a tiltable driver's cab mounted to the front part of the chassis; - a cryogenic tank comprising a storage vessel for storing liquefied natural gas, wherein the cryogenic tank is mounted to the chassis; and - a piping arrangement for discharging boil-off gas from the cryogenic tank to the atmosphere, wherein the piping arrangement comprises a first rigid conduit with an upstream end and a downstream end, the first rigid conduit being secured to the chassis and being connected to a vent outlet of the cryogenic tank at its upstream end in order to allow the first rigid conduit to receive boil-off gas released from the cryogenic tank via the vent outlet, characterized in that the piping arrangement further comprises: - a second rigid conduit with an upstream end and a downstream end, wherein the second rigid conduit at its downstream end is provided with an outlet which opens into the surroundings in order to allow boil-off gas from the cryogenic tank to be discharged to the atmosphere via this outlet; - a holding member, wherein the second rigid conduit is fixed to the holding member and the holding member is intended to be mounted to a cargo body of the LNG truck in order to secure the second rigid conduit to the cargo body after a mounting of the cargo body to the rear part of the chassis; and - a flexible conduit arranged between the downstream end of the first rigid conduit and the upstream end of the second rigid conduit in order to form a flexible flow connection between the first rigid conduit and the second rigid conduit, wherein the flexible conduit has the form of a hose, preferably of plastic material. - a chassis having a front part for supporting a driver's cab and a rear part for supporting a cargo body; - a tiltable driver's cab mounted to the front part of the chassis; - a cryogenic tank comprising a storage vessel for storing liquefied natural gas, wherein the cryogenic tank is mounted to the chassis; and - a piping arrangement for discharging boil-off gas from the cryogenic tank to the atmosphere, wherein the piping arrangement comprises a first rigid conduit with an upstream end and a downstream end, the first rigid conduit being secured to the chassis and being connected to a vent outlet of the cryogenic tank at its upstream end in order to allow the first rigid conduit to receive boil-off gas released from the cryogenic tank via the vent outlet, - a second rigid conduit with an upstream end and a downstream end, wherein the second rigid conduit at its downstream end is provided with an outlet which opens into the surroundings in order to allow boil-off gas from the cryogenic tank to be discharged to the atmosphere via this outlet; - a holding member, wherein the second rigid conduit is fixed to the holding member and the holding member is intended to be mounted to a cargo body of the LNG truck in order to secure the second rigid conduit to the cargo body after a mounting of the cargo body to the rear part of the chassis; and - a flexible conduit arranged between the downstream end of the first rigid conduit and the upstream end of the second rigid conduit in order to form a flexible flow connection between the first rigid conduit and the second rigid conduit, wherein the flexible conduit has the form of a hose, preferably of plastic material.