To prevent a load from being applied to a pin connection part by displacement due to the exposion and shrinkage of each member after connection in the connection structure of electronic parts using an alignment member for aligning a plurality of pins for electrically connecting first and second members.

An aligning member 50 in the connection structure aligns a pin 20 at an outer peripheral part in the axial direction A, rotates it with the axial direction A as a reference for separating from the pin 20 and then is removed from the pin 20. In the aligning member 50, the ratio of the vertical and horizontal dimensional of a cross section for orthogonally crossing the axial direction A differs, a plurality of aligned grooves 51 for aligning the pin 20 to the side in the longitudinal dimensional direction in the cross section are formed. The grooves 51 are formed so that they become narrower from the side in the longitudinal dimension direction in the cross section as toward the center of the cross section.