NOVELTY - The device (500) has plasma processing mechanism (520) to perform plasma-process on joining film formed in base material of joining film transfer sheet (1). A supply mechanism (530) obtains a temporary joining element (7) formed by joining transfer sheet and to-be-adhered element (5). A press mechanism (540) presses temporary joining element. A peeling mechanism (550) peels base material from temporary joining element. The mechanisms are arranged sequentially so that transfer sheet is passed and moved through mechanisms.    USE - Joining film transfer device for joining apparatus (claimed). Uses include but are not limited to join transistor, diode, semiconductor element e.g. memory, and piezoelectric element e.g. quartz oscillator, and optical element e.g. optical filter, reflective mirror, optical lens, diffraction grating, and photoelectric conversion element e.g. solar cell and sensor component e.g. insulated substrate, wiring or electrode, ink jet type recording head, microreactor, and micro electro mechanical systems (MEMS) components e.g. micromirror, pressure sensor, and acceleration sensor, and package components of semiconductor element or electronic component, and display element e.g. LCD element, organic electroluminescent (EL) element, electrophoretic display element, and recording medium e.g. magnetic recording medium, magnetooptical recording medium, optical recording medium, and components for fuel cells etc. on semiconductor substrate.    ADVANTAGE - The joining film transfer device can efficiently join the to-be-adhered elements through the transferred joining film at shorter time without using the complicated mechanism in which the joining film transfer sheet is conveyed so that the structure of the device is simplified and mass-productivity of a joined element is improved.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for joining apparatus.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic perspective view of the joining film transfer device. (Drawing includes non-English language text)    Joining film transfer sheet (1)    To-be-adhered element (5)    Temporary joining element (7)    Joining film transfer device (500)    Plasma processing mechanism (520)    Supply mechanism (530)    Press mechanism (540)    Peeling mechanism (550)