Provided is a tube joining apparatus that allows a user to easily and properly set tubes to be joined, and can prevent occurrence of joining failures due to tube setting errors.A tube joining apparatus 1 includes a housing, a lid relatively movable toward and away from the housing, a tube holding part that holds a first tube and a second tube individually in a state of being placed side by side in an oblique direction with respect to a height direction of the housing, and a tube pressing part that presses the first tube and the second tube against each other as the lid relatively moves toward the housing.
