A clip used for fixing a member to be installed on a body at a body engagement aperture, comprising: a first engagement hook that is configured to engage with a rim defining a body engagement aperture when the clip is in a normal fitting state with the body; a second engagement hook spaced from the rim defining the body engagement aperture when the clip is in the normal fitting state with the body, the second engagement hook being brought into engagement with the rim defining the body engagement aperture when the first engagement hook has been disengaged from the body, thereby preventing the clip from being removed from the body; and a seat and a shaft extending in a direction away from the seat, wherein the second engagement hook is located at a position deeper than the first engagement hook in an inserting direction of the clip into the body engagement aperture, the first engagement hook comprises a pair of first engagement hooks that are provided at the shaft, such that the pair of first engagement hooks are opposed to each other in a direction perpendicular to a center axis line of the clip, an opening is provided at the shaft so as to penetrate the shaft in a direction perpendicular to the direction in which the pair of first engagement hooks are opposed, and the second engagement hook is disposed in the opening such that the second engagement hook is elastically deformable in the direction perpendicular to the direction in which the pair of first engagement hooks are opposed, characterized in further comprising an engagement releasing portion, wherein the engagement releasing portion includes: (i) a connecting end located at a first end of the engagement releasing portion, and (ii) a handling portion located at a second, opposite end of the engagement releasing portion, the engagement releasing portion is connected to the second engagement hook at the connecting end, and the handling portion is provided such that the handling portion is accessible when the clip is removed from the body. a first engagement hook that is configured to engage with a rim defining a body engagement aperture when the clip is in a normal fitting state with the body; a second engagement hook spaced from the rim defining the body engagement aperture when the clip is in the normal fitting state with the body, the second engagement hook being brought into engagement with the rim defining the body engagement aperture when the first engagement hook has been disengaged from the body, thereby preventing the clip from being removed from the body; and a seat and a shaft extending in a direction away from the seat, wherein the second engagement hook is located at a position deeper than the first engagement hook in an inserting direction of the clip into the body engagement aperture, the first engagement hook comprises a pair of first engagement hooks that are provided at the shaft, such that the pair of first engagement hooks are opposed to each other in a direction perpendicular to a center axis line of the clip, an opening is provided at the shaft so as to penetrate the shaft in a direction perpendicular to the direction in which the pair of first engagement hooks are opposed, and the second engagement hook is disposed in the opening such that the second engagement hook is elastically deformable in the direction perpendicular to the direction in which the pair of first engagement hooks are opposed, characterized in further comprising an engagement releasing portion, wherein the engagement releasing portion includes: (i) a connecting end located at a first end of the engagement releasing portion, and (ii) a handling portion located at a second, opposite end of the engagement releasing portion, the engagement releasing portion is connected to the second engagement hook at the connecting end, and the handling portion is provided such that the handling portion is accessible when the clip is removed from the body.