An elevator door apparatus comprising: first and second car doors (8 and 9) that are disposed on a car; a door motor that is disposed on the car; a power transmitting body that is moved by the door motor, and that transmits a driving force from the door motor to the first and second car doors (8 and 9); first and second landing doors (23 and 24) that are disposed on a landing; a landing door coupling mechanism that couples the second landing door to opening and closing actions of the first landing door; and an engaging apparatus that is disposed on the first car door, and that is connected to the power transmitting body, and that engages with the first landing door, wherein: the engaging apparatus completes engagement with the first landing door and starts a door opening action of the first car door and the first landing door when the power transmitting body moves by a predetermined amount during door opening commencement; a car door coupling mechanism that is connected to the power transmitting body is disposed on the second car door; and the car door coupling mechanism transmits movement of the power transmitting body to the second car door and starts a door opening action of the second car door when the power transmitting body moves by the same amount with the predetermined amount during door opening commencement characterized in that the car door coupling mechanism comprises: a coupling mechanism linking fitting (62, 72) that is disposed displaceably on the second car door, and that is connected to the power transmitting body; and a stopper portion (61a, 71a) that restricts displacement of the coupling mechanism linking fitting (62, 72) that accompanies movement of the power transmitting body in a door opening direction; and the coupling mechanism linking fitting (62, 72) comes into contact with the stopper portion (61a, 71a) and movement of the power transmitting body is transmitted to the second car door by means of the coupling mechanism linking fitting (62, 72) and the stopper portion (61a, 71a) when the power transmitting body moves by the predetermined amount during door opening commencement. first and second car doors (8 and 9) that are disposed on a car; a door motor that is disposed on the car; a power transmitting body that is moved by the door motor, and that transmits a driving force from the door motor to the first and second car doors (8 and 9); first and second landing doors (23 and 24) that are disposed on a landing; a landing door coupling mechanism that couples the second landing door to opening and closing actions of the first landing door; and an engaging apparatus that is disposed on the first car door, and that is connected to the power transmitting body, and that engages with the first landing door, the engaging apparatus completes engagement with the first landing door and starts a door opening action of the first car door and the first landing door when the power transmitting body moves by a predetermined amount during door opening commencement; a car door coupling mechanism that is connected to the power transmitting body is disposed on the second car door; and the car door coupling mechanism transmits movement of the power transmitting body to the second car door and starts a door opening action of the second car door when the power transmitting body moves by the same amount with the predetermined amount during door opening commencement the car door coupling mechanism comprises: a coupling mechanism linking fitting (62, 72) that is disposed displaceably on the second car door, and that is connected to the power transmitting body; and a stopper portion (61a, 71a) that restricts displacement of the coupling mechanism linking fitting (62, 72) that accompanies movement of the power transmitting body in a door opening direction; and the coupling mechanism linking fitting (62, 72) comes into contact with the stopper portion (61a, 71a) and movement of the power transmitting body is transmitted to the second car door by means of the coupling mechanism linking fitting (62, 72) and the stopper portion (61a, 71a) when the power transmitting body moves by the predetermined amount during door opening commencement.