A continuous casting nozzle apt for the vertical upwards continuous casting of metal into continuous cast products, said nozzle comprising: - a cooling mantle, including concentrically a first outermost pipe member, a second middle pipe member, and a third inner pipe member and therebetween two cylindrical channels (7a, 7b), which are co-directional with the pipe members and apt for causing a flow-through of cooling water, and said cooling mantle having a top portion (1 y) and a bottom portion (1 a); - a mold section, which consists of a refractory material and which has a top end with its upper frontal surface, and a bottom end, said top end extending coaxially into an interior of said cooling mantle and being, by way of a heat transfer joint, in attachment with said cooling mantle, and said bottom end protruding from the cooling mantle; - said mold section has an internal mold cross-section for providing an external shape of said continuous cast product, and said third pipe member has an internal cross-section which is larger than said mold cross-section, characterized in that the continuous casting nozzle 1 further comprises a fourth innermost pipe member inside said third inner pipe member, said fourth pipe member: - extending coaxially inside the third pipe member at least over part of a length of this third pipe member and having a lower frontal surface in abutment with said upper frontal surface of the mold section; - having an internal cooling cross-section, whose size is equal to or larger than said mold cross-section; - having an external surface, by which this fourth pipe member fits inside the third pipe member; and - comprising on its external surface at least one length channel, as well as in its lower frontal surface or in the vicinity thereof, one or more radially directed openings, which is/are in flow communication with said at least one length channel, whereby said at least one length channel and the radially directed openings are apt for causing a protective cooling gas to flow through and to be delivered inside this fourth pipe member, into an intermediate space between said continuous cast product and the fourth pipe member. - a cooling mantle, including concentrically a first outermost pipe member, a second middle pipe member, and a third inner pipe member and therebetween two cylindrical channels (7a, 7b), which are co-directional with the pipe members and apt for causing a flow-through of cooling water, and said cooling mantle having a top portion (1 y) and a bottom portion (1 a); - a mold section, which consists of a refractory material and which has a top end with its upper frontal surface, and a bottom end, said top end extending coaxially into an interior of said cooling mantle and being, by way of a heat transfer joint, in attachment with said cooling mantle, and said bottom end protruding from the cooling mantle; - said mold section has an internal mold cross-section for providing an external shape of said continuous cast product, and said third pipe member has an internal cross-section which is larger than said mold cross-section, characterized in that the continuous casting nozzle 1 further comprises a fourth innermost pipe member inside said third inner pipe member, said fourth pipe member: - extending coaxially inside the third pipe member at least over part of a length of this third pipe member and having a lower frontal surface in abutment with said upper frontal surface of the mold section; - having an internal cooling cross-section, whose size is equal to or larger than said mold cross-section; - having an external surface, by which this fourth pipe member fits inside the third pipe member; and - comprising on its external surface at least one length channel, as well as in its lower frontal surface or in the vicinity thereof, one or more radially directed openings, which is/are in flow communication with said at least one length channel, whereby said at least one length channel and the radially directed openings are apt for causing a protective cooling gas to flow through and to be delivered inside this fourth pipe member, into an intermediate space between said continuous cast product and the fourth pipe member.