To avoid deterioration of workability when a terminal cover is mounted to an apparatus.

In a mounting structure, a terminal cover 10 in which a terminal fitting 20 connected to a stud bolt 47 is housed is mounted to a starter 40 (apparatus) having the stud bolt 47 (mating terminal). The structure comprises a pair of elastic lock pieces 34, 35 provided on the terminal cover 10, arranged opposite to a direction crossing with a direction for mounting to the starter 40, elastically deformed in opposite directions in a process for mounting the terminal cover 10 to the starter 40, elastically recovered and locked with the starter 40 for locking the terminal cover 10 in a mounting condition. A pair of the elastic lock pieces 34, 35 are in a form that the weak elastic lock piece 34 (one elastic lock piece) has resilience relatively weaker than the strong elastic lock piece 35 (the other elastic lock piece).