An electronic element unit (1) includes an electronic element (2) having a plurality of connecting terminals (12) on a lower surface thereof, a circuit board (3) having a plurality of electrodes (22) corresponding to the connecting terminals (12) on an upper surface thereof. The connecting terminals (12) and the electrodes (22) are connected by solder bumps (23), and the electronic element (2) and the circuit board (3) are partly bond by a resin bond part (24) made of a thermosetting material of a thermosetting resin, and a metal powder (25) is included in the resin bond parts (24) in a dispersed state. The metal powder (25) has a melting point lower than a temperature at which the resin bond parts (24) are heated when a work (a repairing work) is carried out for removing the electronic element (2) from the circuit board (3).