To provide a good liquid-tight connector which allows an easy visual check of liquid level displacement of a filler when injecting, prevents an undesired liquid level rise in a filler injection recess, and prevents a misfit between connectors.

In a liquid-tight connector 20, a fitting recess 25b fitted to a male connector 13 is formed in a female connector 25 of a housing 23, and a filler 15 is filled into a filler injection recess 25d formed around the base of terminal fittings 9 projecting from an inner bottom wall 25a of the fitting recess 25b. On a peripheral wall on the filler injection recess 25d, three step parts 31, 32, 33 are provided in the form of steps spreading out toward an open end of the fitting recess 25b.