A connecting structure for motor including: a first motor; and a second motor, each of which includes: a motor main body (2A, 2B) including a stator (14A, 14B) having at least a first-phase winding and a first-phase lead conductor which outwardly extends from one end side of the first-phase winding and a rotor (15A, 15B) which is disposed so as to rotate relative to the stator (14A, 14B); a casing (11A, 11B) which accommodates the motor main body (2A, 2B); an inside-outside connecting conductor (72A, 72B) which connects electrically an inside conductor with an outside conductor of the casing; and a first-phase relay conductor which is accommodated in the casing (11A, 11B) and which is connected to the first-phase lead conductor at one end side and is connected to the inside-outside connecting conductor (72A, 72B) at the other end side, wherein a rotational axis of the first motor and a rotational axis of the second motor are disposed on the same straight line, characterized in that the inside-outside connecting conductor of the first motor and the inside-outside connecting conductor of the second motor are disposed substantially in mirror symmetric positions with respect to a middle plane which intersects the straight line at right angles and which is situated between the first motor main body and the second motor main body, and the first-phase lead conductor of the first motor and the first-phase lead conductor of the second motor are disposed in non-mirror symmetric positions with respect to the middle plane, and wherein a size of the first-phase relay conductor of the first motor and a size of the first-phase relay conductor of the second motor differ from each other. a first motor; and a second motor, each of which includes: a motor main body (2A, 2B) including a stator (14A, 14B) having at least a first-phase winding and a first-phase lead conductor which outwardly extends from one end side of the first-phase winding and a rotor (15A, 15B) which is disposed so as to rotate relative to the stator (14A, 14B); a casing (11A, 11B) which accommodates the motor main body (2A, 2B); an inside-outside connecting conductor (72A, 72B) which connects electrically an inside conductor with an outside conductor of the casing; and a first-phase relay conductor which is accommodated in the casing (11A, 11B) and which is connected to the first-phase lead conductor at one end side and is connected to the inside-outside connecting conductor (72A, 72B) at the other end side, a motor main body (2A, 2B) including a stator (14A, 14B) having at least a first-phase winding and a first-phase lead conductor which outwardly extends from one end side of the first-phase winding and a rotor (15A, 15B) which is disposed so as to rotate relative to the stator (14A, 14B); a stator (14A, 14B) having at least a first-phase winding and a first-phase lead conductor which outwardly extends from one end side of the first-phase winding and a rotor (15A, 15B) which is disposed so as to rotate relative to the stator (14A, 14B); a casing (11A, 11B) which accommodates the motor main body (2A, 2B); an inside-outside connecting conductor (72A, 72B) which connects electrically an inside conductor with an outside conductor of the casing; and a first-phase relay conductor which is accommodated in the casing (11A, 11B) and which is connected to the first-phase lead conductor at one end side and is connected to the inside-outside connecting conductor (72A, 72B) at the other end side, wherein a rotational axis of the first motor and a rotational axis of the second motor are disposed on the same straight line, characterized in that the inside-outside connecting conductor of the first motor and the inside-outside connecting conductor of the second motor are disposed substantially in mirror symmetric positions with respect to a middle plane which intersects the straight line at right angles and which is situated between the first motor main body and the second motor main body, and the first-phase lead conductor of the first motor and the first-phase lead conductor of the second motor are disposed in non-mirror symmetric positions with respect to the middle plane, and wherein a size of the first-phase relay conductor of the first motor and a size of the first-phase relay conductor of the second motor differ from each other.