Waterproof connector

A waterproof connector comprising:

• a first connector housing;
• a second connector housing fitted to the first connector housing;
• a grommet configured to cover at least one of the first connector housing and the second connector housing;
• and
• a fastening member inserted from a side of the grommet to connect the first connector housing with the second connector housing, wherein
• the grommet is formed with a predetermined length along the inserting direction of the fastening member and includes a sealing part formed integrally with the grommet at a grommet's part into which the fastening member is to be inserted,
• and wherein the sealing part includes an outer surface and is provided, on an outer peripheral part thereof, with an annular groove defined, at least in part, by an engagement extension part recessed from the outer surface of the sealing part in the inserting direction of the fastening member, the engagement extension part absorbing a tension when the grommet is pulled.