NOVELTY - A joining-film transfer device (700) has activation unit with which activation of joining film of joining-film transfer sheet (1) is carried out by plasma processing and energy irradiation treatment, to-be-adhered component supply unit in which temporary joining material (7) is formed by supplying to-be-adhered component (5) and joining joining-film transfer sheet and to-be-adhered component such that activated joining film is contacted, a press unit (730) to press the temporary joining material (7) and peeling unit (740).    USE - Joining-film transfer device is used for joining apparatus (claimed). Uses include but are not limited to joining of transistor, diode, memory, quartz oscillator, reflective mirror, optical lens, optical filter, solar cell, semiconductor substrate and microreactor.    ADVANTAGE - The joining-film transfer device efficiently joins to-be-adhered component and another to-be-adhered component using the joining film having excellent adhesiveness, chemical resistance and dimensional stability, without contaminations.    DETAILED DESCRIPTION - A joining-film transfer device has activation unit with which activation of joining film of joining-film transfer sheet is carried out by plasma processing and energy irradiation treatment, to-be-adhered component supply unit in which temporary joining material (7) is formed by supplying to-be-adhered component and joining joining-film transfer sheet and to-be-adhered component such that activated joining film is contacted, a press unit to press the temporary joining material (7), and a peeling unit to transfer at least one portion of joining film to to-be-adhered-component side and peeling base material from the pressed temporary joining material (7) to obtain temporary joining material (8). The joining film having leaving group comprising organic groups, and silicon structure comprising atomic structure including siloxane bonding and the leaving group bonded with silicon structure is provided on a base material having rigidity. The joining film is transferred to to-be-adhered component. An INDEPENDENT CLAIM is included for joining apparatus.    DESCRIPTION OF DRAWING(S) - The drawing shows the perspective view of the joining apparatus. (Drawing includes non-English language text)    Joining-film transfer sheet (1)    To-be-adhered component (5)    Temporary joining materials (7,8)    Joining-film transfer device (700)    Press unit (730)    Peeling unit (740)