A connector comprising: a housing to be fitted to a mating component; and an annular packing to be sandwiched between the housing and the mating component and comes into contact with both the housing and the mating component, wherein the packing having: an annular seal portion protruding toward a radially outer side at a position away from an end portion on one side of the packing in a fitting direction of the housing and the mating component toward another one side in the fitting direction, and an annular depressed portion located on a surface of the seal portion on the radially inner side and depressed toward the radially outer side, the edge on the one side of the depressed portion being located on the one side with respect to the protruding end of the seal portion, the housing being disposed on the radially inner side of the packing, upon the housing and the mating component being fitted to each other, the protruding end of the seal portion being in contact with the mating component, the edge on the one side and the edge on the another one side of the depressed portion being in contact with the housing, and the end portion being displaced in a direction away from the housing to warp with a vicinity of the edge on the one side as a center, characterized in that a groove width of the depressed portion in the fitting direction is larger than a protrusion width of the seal portion in the fitting direction. a housing to be fitted to a mating component; and an annular packing to be sandwiched between the housing and the mating component and comes into contact with both the housing and the mating component, wherein the packing having: an annular seal portion protruding toward a radially outer side at a position away from an end portion on one side of the packing in a fitting direction of the housing and the mating component toward another one side in the fitting direction, and an annular depressed portion located on a surface of the seal portion on the radially inner side and depressed toward the radially outer side, an annular seal portion protruding toward a radially outer side at a position away from an end portion on one side of the packing in a fitting direction of the housing and the mating component toward another one side in the fitting direction, and an annular depressed portion located on a surface of the seal portion on the radially inner side and depressed toward the radially outer side, the edge on the one side of the depressed portion being located on the one side with respect to the protruding end of the seal portion, the housing being disposed on the radially inner side of the packing, upon the housing and the mating component being fitted to each other, the protruding end of the seal portion being in contact with the mating component, the edge on the one side and the edge on the another one side of the depressed portion being in contact with the housing, and the end portion being displaced in a direction away from the housing to warp with a vicinity of the edge on the one side as a center, characterized in that a groove width of the depressed portion in the fitting direction is larger than a protrusion width of the seal portion in the fitting direction.