Hair styling appliance, comprising at least: - a first arm and a second arm comprising respectively a first contact surface and a second contact surface, the first and second arms (5, 6) being mounted to be articulated with respect to each other between an open configuration in which the first and second contact surfaces (7, 8) are spaced apart from each another and a strand of hair is able to be introduced between the first and second contact surfaces (7, 8), and a closed configuration in which the first and second contact surfaces (7, 8) are close to each other and are able to clamp a strand of hair, - a reservoir mounted on the first arm and adapted to contain a fluid to be vaporized, - a vaporization device mounted on the first arm and configured to produce steam, and - a fluid conveyor element secured to the reservoir and configured to convey the fluid contained in the reservoir towards the vaporization device, - the reservoir being movably mounted between a resting position in which the fluid conveyor element is away from the vaporization device, and a vaporization position in which the fluid conveyor element is close to the vaporization device and the vaporization device is configured to vaporize the fluid conveyed by the fluid conveyor element, the hair styling appliance further comprising an actuating element configured to move the reservoir from the resting position to the vaporization position when the first and second arms (5, 6) are moved from the open configuration to the closed configuration, characterised in that the actuating element comprises a cam surface having a continuous curved profile configured to engage with the reservoir, and in that the actuating element is pivotably mounted about a pivot axis, the hair styling appliance further comprising a biasing element configured to bias the actuating element towards an actuation position in which the actuating element is able to exert pushing force on the reservoir. - a first arm and a second arm comprising respectively a first contact surface and a second contact surface, the first and second arms (5, 6) being mounted to be articulated with respect to each other between an open configuration in which the first and second contact surfaces (7, 8) are spaced apart from each another and a strand of hair is able to be introduced between the first and second contact surfaces (7, 8), and a closed configuration in which the first and second contact surfaces (7, 8) are close to each other and are able to clamp a strand of hair, - a reservoir mounted on the first arm and adapted to contain a fluid to be vaporized, - a vaporization device mounted on the first arm and configured to produce steam, and - a fluid conveyor element secured to the reservoir and configured to convey the fluid contained in the reservoir towards the vaporization device, - the reservoir being movably mounted between a resting position in which the fluid conveyor element is away from the vaporization device, and a vaporization position in which the fluid conveyor element is close to the vaporization device and the vaporization device is configured to vaporize the fluid conveyed by the fluid conveyor element, the hair styling appliance further comprising an actuating element configured to move the reservoir from the resting position to the vaporization position when the first and second arms (5, 6) are moved from the open configuration to the closed configuration, characterised in that the actuating element comprises a cam surface having a continuous curved profile configured to engage with the reservoir, and in that the actuating element is pivotably mounted about a pivot axis, the hair styling appliance further comprising a biasing element configured to bias the actuating element towards an actuation position in which the actuating element is able to exert pushing force on the reservoir.