A connector assembly comprising: a connector, a circuit board having a hole, and a mating connector, wherein the connector for mounting on the circuit board and for fitting to the mating connector, includes a contact, and a housing the housing is inserted in the hole of the circuit board, wherein the connector is mounted on the circuit board and fitted to the mating connector, said housing holds said contact and is inserted in the hole of the circuit board, said contact including a holding portion which is held by said housing, a contact portion which is continuous to said holding portion and is contactable to a mating contact of the mating connector, and a connection portion which is continuous to said holding portion and is for connecting to amounting surface of the circuit board, wherein the contact portion is brought into contact with a mating contact of the mating connector, and wherein the connection portion is connected to a mounting surface of the circuit board, characterized in that: said housing includes a first press-fit hole for receiving and holding said holding portion, and said holding portion being press-fitted into said first press-fit hole in a direction orthogonal to a direction of inserting said housing into the hole, said contact includes a rocking suppression portion which is continuous to said holding portion and is held by said housing, said housing includes a second press-fit hole for receiving and holding said rocking suppression portion, and said rocking suppression portion is press-fitted into said second press-fit hole in the orthogonal direction, for suppressing the rocking force applied to the connector. a connector, a circuit board having a hole, and a mating connector, wherein the connector for mounting on the circuit board and for fitting to the mating connector, includes a contact, and a housing the housing is inserted in the hole of the circuit board, wherein the connector is mounted on the circuit board and fitted to the mating connector, said housing holds said contact and is inserted in the hole of the circuit board, said contact including a holding portion which is held by said housing, a contact portion which is continuous to said holding portion and is contactable to a mating contact of the mating connector, and a connection portion which is continuous to said holding portion and is for connecting to amounting surface of the circuit board, wherein the contact portion is brought into contact with a mating contact of the mating connector, and wherein the connection portion is connected to a mounting surface of the circuit board, characterized in that: said housing includes a first press-fit hole for receiving and holding said holding portion, and said holding portion being press-fitted into said first press-fit hole in a direction orthogonal to a direction of inserting said housing into the hole, said contact includes a rocking suppression portion which is continuous to said holding portion and is held by said housing, said housing includes a second press-fit hole for receiving and holding said rocking suppression portion, and said rocking suppression portion is press-fitted into said second press-fit hole in the orthogonal direction, for suppressing the rocking force applied to the connector. said housing includes a first press-fit hole for receiving and holding said holding portion, and said holding portion being press-fitted into said first press-fit hole in a direction orthogonal to a direction of inserting said housing into the hole, said contact includes a rocking suppression portion which is continuous to said holding portion and is held by said housing, said housing includes a second press-fit hole for receiving and holding said rocking suppression portion, and said rocking suppression portion is press-fitted into said second press-fit hole in the orthogonal direction, for suppressing the rocking force applied to the connector.