Abstract: A kit for injecting thermally-conditioned fluids, particularly for first-aid actions, comprising a bag with at least one first pocket therein for containing at least one pouch of fluid to be injected or at least one pouch of fluid to be injected and a pouch-shaped thermal reactor, the pocket being provided with a closure flap suitable to contain leaks of the fluid and/or of reagents of the reactor, and at least one second pocket for containing an air-filled chamber associated with an air pump, at least the first pocket and the flap being made of impermeable and thermally-insulating material.