Connector and assembly method of connector

A connector comprising:

• a first pin group, a second pin group, a third pin group, and a fourth pin group each including a plurality of aligned contact pins;
• an outer housing in which the first pin group and the second pin group facing each other are held by press-fitting;
• and
• an inner housing in which the third pin group and the fourth pin group facing each other are held by press-fitting,
• wherein the inner housing is accommodated in the outer housing.

An assembly method of a connector comprising

• a first pin group, a second pin group, a third pin group, and a fourth pin group each including a plurality of aligned contact pins,
• an outer housing holding the first pin group and the second pin group facing each other, and
• an inner housing holding the third pin group and the fourth pin group facing each other,
• the assembly method comprising:
• press-fitting the first pin group and the second pin group in the outer housing;
• press-fitting the third pin group and the fourth pin group in the inner housing;
• and
• inserting the inner housing holding the third pin group and the fourth pin group in the outer housing holding the first pin group and the second pin group.