Method for manufacturing a heat exchanger plate comprising the following steps: - providing a plate stack, which is formed from at least two plate elements made of a metallic material with a solder material arranged between the plate elements, - transferring the plate stack into a heated hot forming tool having a lower tool and an upper tool, which has contact surfaces (16, 17) with at least one channel cavity, - inserting the plate stack into the hot forming tool, wherein the plate stack is positioned on spacer elements, which are arranged flexibly in the lower tool and project relative to the contact surface of the lower tool, - closing the hot forming tool, wherein the lower tool and the upper tool are displaced relative to each other, - continuing the closing movement and clamping the plate stack between the lower tool and the upper tool, wherein the spacer elements in the lower tool are displaced into the lower tool and the plate stack comes into surface contact between the lower tool and the upper tool, - heating the plate stack and - applying internal pressure to a space between the plate elements of the plate stack by introducing an active medium and forming a channel by using internal pressure to transform at least one plate element region into the channel cavity, wherein the channel cavity is vented, and - melting the solder material between the plate elements and joining the plate elements, by soldering to joining surfaces of the plate elements that are in contact, - opening the hot forming tool, wherein the lower tool and the upper tool are displaced relative to each other, wherein the spacer elements are moved in the lower tool out of the lower tool, such that the plate stack is held at a distance from the lower tool on the spacer elements in the lower tool, - holding and cooling the plate stack, - opening the hot forming tool until a removal position is reached and removing the heat exchanger plate from the hot forming tool. - providing a plate stack, which is formed from at least two plate elements made of a metallic material with a solder material arranged between the plate elements, - transferring the plate stack into a heated hot forming tool having a lower tool and an upper tool, which has contact surfaces (16, 17) with at least one channel cavity, - inserting the plate stack into the hot forming tool, wherein the plate stack is positioned on spacer elements, which are arranged flexibly in the lower tool and project relative to the contact surface of the lower tool, - closing the hot forming tool, wherein the lower tool and the upper tool are displaced relative to each other, - continuing the closing movement and clamping the plate stack between the lower tool and the upper tool, wherein the spacer elements in the lower tool are displaced into the lower tool and the plate stack comes into surface contact between the lower tool and the upper tool, - heating the plate stack and - applying internal pressure to a space between the plate elements of the plate stack by introducing an active medium and forming a channel by using internal pressure to transform at least one plate element region into the channel cavity, wherein the channel cavity is vented, and - melting the solder material between the plate elements and joining the plate elements, by soldering to joining surfaces of the plate elements that are in contact, - opening the hot forming tool, wherein the lower tool and the upper tool are displaced relative to each other, wherein the spacer elements are moved in the lower tool out of the lower tool, such that the plate stack is held at a distance from the lower tool on the spacer elements in the lower tool, - holding and cooling the plate stack, - opening the hot forming tool until a removal position is reached and removing the heat exchanger plate from the hot forming tool.