An insulator which is disposed between a vibration device and an external surface and inhibits vibration transmission between the vibration device and the external surface, the insulator comprising: N plate-shaped members which are first to Nth plate-shaped members and are arranged in this order at multiple stages such that reference points on the respective plate-shaped members are aligned in a vertical direction, N being an integer not less than 3, wherein the plate-shaped member for a kth number counted from the first plate-shaped member is defined as a kth plate-shaped member, k being all integers not less than 2 and not greater than N - 1, the first plate-shaped member is provided with a first wire support portion (1A, 1B, 1C), the kth plate-shaped member (30, when k = 3) is provided with a kth through hole (34A, 34B, 34C) through which a (k - 1)th wire support portion (2A, 2B, 2C) provided to the (k - 1)th plate-shaped member penetrates, a (k - 1)th wire suspending the kth plate-shaped member is provided at an upper part of the (k - 1)th wire support portion (2A, 2B, 2C) penetrating through the kth through hole (34A, 34B, 34C), and a kth wire support portion (3A, 3B, 3C) is provided at a position adjacent to the kth through hole (34A, 34B, 34C) in a predetermined rotational direction around the reference point on the kth plate-shaped member, the Nth plate-shaped member (50, when N = 5) is provided with an Nth through hole (54A, 54B, 54C) through which an (N - 1)th wire support portion (4A, 4B, 4C) provided to the (N - 1)th plate-shaped member penetrates, an (N - 1)th wire suspending the Nth plate-shaped member is provided at an upper part of the (N - 1)th wire support portion (4A, 4B, 4C) penetrating through the Nth through hole (54A, 54B, 54C), and a mounting base for mounting the vibration device thereon is attached to the Nth plate-shaped member, the first wire support portions (1A, 1B, 1C) on the first plate-shaped member and the first wires thereof are arranged at a plurality of locations around the reference point on the first plate-shaped member, and the kth wire support portions (3A, 3B, 3C) on the kth plate-shaped member (30, when k = 3) and the kth wires thereof are arranged at a plurality of locations around the reference point on the kth plate-shaped member. N plate-shaped members which are first to Nth plate-shaped members and are arranged in this order at multiple stages such that reference points on the respective plate-shaped members are aligned in a vertical direction, N being an integer not less than 3, wherein the plate-shaped member for a kth number counted from the first plate-shaped member is defined as a kth plate-shaped member, k being all integers not less than 2 and not greater than N - 1, the first plate-shaped member is provided with a first wire support portion (1A, 1B, 1C), the kth plate-shaped member (30, when k = 3) is provided with a kth through hole (34A, 34B, 34C) through which a (k - 1)th wire support portion (2A, 2B, 2C) provided to the (k - 1)th plate-shaped member penetrates, a (k - 1)th wire suspending the kth plate-shaped member is provided at an upper part of the (k - 1)th wire support portion (2A, 2B, 2C) penetrating through the kth through hole (34A, 34B, 34C), and a kth wire support portion (3A, 3B, 3C) is provided at a position adjacent to the kth through hole (34A, 34B, 34C) in a predetermined rotational direction around the reference point on the kth plate-shaped member, the Nth plate-shaped member (50, when N = 5) is provided with an Nth through hole (54A, 54B, 54C) through which an (N - 1)th wire support portion (4A, 4B, 4C) provided to the (N - 1)th plate-shaped member penetrates, an (N - 1)th wire suspending the Nth plate-shaped member is provided at an upper part of the (N - 1)th wire support portion (4A, 4B, 4C) penetrating through the Nth through hole (54A, 54B, 54C), and a mounting base for mounting the vibration device thereon is attached to the Nth plate-shaped member, the first wire support portions (1A, 1B, 1C) on the first plate-shaped member and the first wires thereof are arranged at a plurality of locations around the reference point on the first plate-shaped member, and the kth wire support portions (3A, 3B, 3C) on the kth plate-shaped member (30, when k = 3) and the kth wires thereof are arranged at a plurality of locations around the reference point on the kth plate-shaped member.