A damper unit a high pressure fuel pump comprising: at least two damper bodies (2, 2') installed in a housing space so as to be stacked and including hermetically sealed spaces therein; an elastic member that is disposed between the damper bodies (2, 2'); and a stopper that is installed across outer peripheral edge portions (2a, 2a') of the damper bodies (2, 2') positioned at both ends, wherein the stopper includes a plurality of connector portions (26b, 27, 30, 31) that are installed across the outer peripheral edge portions (2a, 2a') of the damper bodies (2, 2') positioned at both ends and that are spaced apart from each other in a circumferential direction of the damper bodies (2, 2'), wherein a concave portion is formed on the outer peripheral edge portion (2a, 2a') of the damper body (2, 2'), and the stopper includes convex portions that are locked to the concave portion, wherein each of the connector portions (26b, 27, 30, 31) of the stopper includes a locking piece portion that is brought into contact with the outer peripheral edge portion (2a, 2a') of the damper body (2, 2') in an axial direction and an extending portion that extends across the damper bodies (2, 2') positioned at both ends, an inner peripheral side of the extending portion is disposed closer to an outer peripheral side than a welded portion of the outer peripheral edge portion (2a, 2a') of the damper body (2, 2'), the concave portion formed on the damper body (2, 2') is positioned closer to an inner peripheral side than the welded portion of the outer peripheral edge portion (2a, 2a') of the damper body (2, 2'), characterized in that each of the connector portions (26b, 27, 30, 31) includes another locking piece portion, the two locking portions extending toward an inner peripheral side of the damper body (2, 2') to face the outer peripheral edge portion (2a, 2a') of the damper body (2, 2') in a direction perpendicular to the outer peripheral edge portion (2a, 2a'), and the locking piece portions and the extending portion form a U shape. at least two damper bodies (2, 2') installed in a housing space so as to be stacked and including hermetically sealed spaces therein; an elastic member that is disposed between the damper bodies (2, 2'); and a stopper that is installed across outer peripheral edge portions (2a, 2a') of the damper bodies (2, 2') positioned at both ends, wherein the stopper includes a plurality of connector portions (26b, 27, 30, 31) that are installed across the outer peripheral edge portions (2a, 2a') of the damper bodies (2, 2') positioned at both ends and that are spaced apart from each other in a circumferential direction of the damper bodies (2, 2'), wherein a concave portion is formed on the outer peripheral edge portion (2a, 2a') of the damper body (2, 2'), and the stopper includes convex portions that are locked to the concave portion, wherein each of the connector portions (26b, 27, 30, 31) of the stopper includes a locking piece portion that is brought into contact with the outer peripheral edge portion (2a, 2a') of the damper body (2, 2') in an axial direction and an extending portion that extends across the damper bodies (2, 2') positioned at both ends, an inner peripheral side of the extending portion is disposed closer to an outer peripheral side than a welded portion of the outer peripheral edge portion (2a, 2a') of the damper body (2, 2'), the concave portion formed on the damper body (2, 2') is positioned closer to an inner peripheral side than the welded portion of the outer peripheral edge portion (2a, 2a') of the damper body (2, 2'), characterized in that each of the connector portions (26b, 27, 30, 31) includes another locking piece portion, the two locking portions extending toward an inner peripheral side of the damper body (2, 2') to face the outer peripheral edge portion (2a, 2a') of the damper body (2, 2') in a direction perpendicular to the outer peripheral edge portion (2a, 2a'), and the locking piece portions and the extending portion form a U shape.