A connector includes an insulator, into which a thin plate-like object is removably insertable, including contact insertion grooves and partition walls positioned therebetween and contacts inserted into the contact insertion grooves, each of the contacts including first and second contact portions spaced from each other to allow the thin plate-like object to be inserted therebetween, and including a connecting portion connecting the first and second contact portions. At least one of the first and second contact portions contacts the thin plate-like object when inserted into the insulator. A hollow portion having a greater width than the contact insertion grooves is formed in each partition wall to superimpose part of each contact as viewed in a contact arranging direction, and the partition walls prevent each hollow portion from being communicatively connected with the contact insertion grooves.