A watertight clip may include a watertight clip main body and a packing. The watertight clip main body has a stabilizer, a pillar extending from the stabilizer, engagement legs formed in the pillar, and a packing retainer member. When the pillar is inserted into an attaching hole formed in a plate-shaped subject member, the subject member is positioned between the engagement legs and the stabilizer, so that an attached member connected to the stabilizer can be attached to the subject member. The packing is previously attached to the pillar. The packing is interleaved between the subject member and the stabilizer. The packing retainer member is configured to prevent the packing from separating from the pillar.