An air-conditioning apparatus comprising: an outdoor unit including an outdoor heat exchanger; an indoor unit including an indoor heat exchanger (5a, 5b); and a relay unit provided between the outdoor unit and the indoor unit, and including one or more first refrigerant supply pipes and one or more second refrigerant supply pipes that are connected to the indoor heat exchanger (5a, 5b) of the indoor unit, wherein the one or more first refrigerant supply pipes and the one or more second refrigerant supply pipes protrude from a side surface of the relay unit, the one or more first refrigerant supply pipes are each provided above an associated one of the one or more second refrigerant supply pipes, a length of part of the one or more first refrigerant supply pipes that protrudes from the side surface is greater than a length of part of the one or more second refrigerant supply pipes that protrudes from the side surface, the one or more first refrigerant supply pipes each include: a first pipe fixed to the side surface of the relay unit; and a first joint located at a distal end of the first pipe, the first joint has: a first portion located at the distal end of the first pipe; a second portion that is located at one of ends of the first portion that is closer to the indoor unit, the second portion being connected to the indoor heat exchanger (5a, 5b) of the indoor unit; a third portion that is formed in the shape of a circular tube and located at the other end of the first portion, the other end of the first portion being closer to the relay unit; and a brazed portion located between the third portion and the first pipe of the first refrigerant supply pipe, the third portion being brazed to the first pipe of the first refrigerant supply pipe, and a distance (L2 + D) from the side surface to the one of the ends of the first portion is longer than a distance from the side surface to a distal end of the second refrigerant supply pipe. an outdoor unit including an outdoor heat exchanger; an indoor unit including an indoor heat exchanger (5a, 5b); and a relay unit provided between the outdoor unit and the indoor unit, and including one or more first refrigerant supply pipes and one or more second refrigerant supply pipes that are connected to the indoor heat exchanger (5a, 5b) of the indoor unit, wherein the one or more first refrigerant supply pipes and the one or more second refrigerant supply pipes protrude from a side surface of the relay unit, the one or more first refrigerant supply pipes are each provided above an associated one of the one or more second refrigerant supply pipes, a length of part of the one or more first refrigerant supply pipes that protrudes from the side surface is greater than a length of part of the one or more second refrigerant supply pipes that protrudes from the side surface, the one or more first refrigerant supply pipes each include: a first pipe fixed to the side surface of the relay unit; and a first joint located at a distal end of the first pipe, the first joint has: a first portion located at the distal end of the first pipe; a second portion that is located at one of ends of the first portion that is closer to the indoor unit, the second portion being connected to the indoor heat exchanger (5a, 5b) of the indoor unit; a third portion that is formed in the shape of a circular tube and located at the other end of the first portion, the other end of the first portion being closer to the relay unit; and a brazed portion located between the third portion and the first pipe of the first refrigerant supply pipe, the third portion being brazed to the first pipe of the first refrigerant supply pipe, and a distance (L2 + D) from the side surface to the one of the ends of the first portion is longer than a distance from the side surface to a distal end of the second refrigerant supply pipe.