To visually recognize abnormality of injection amount of filler by providing a housing having a cavity for storing a terminal fitting with a cylindrical injection portion surrounding an opening region of the cavity and by forming a light permeable, thin recognition portion in a wall portion of the cylindrical injection portion.

A housing 10 is made of synthetic resin material, and its color is, a bright color such as white or milky white so as to easily penetrate light. A cylindrical injection portion 12 is formed at the rear end of this housing 10, and filler 25 is injected into this cylindrical injection portion 12 so as to fill a gap between an electric wire 21 extending from a cavity 11 and the inner periphery of the cylindrical injection portion 12. Color of this filler 25, contrary to the color of the housing 10, is dark color with lower light permeability such as brawn. Such cylindrical injection portion 12 is provided with two recognition portions 14 made thinner by recessing the outer surface of its wall portion 12A. These recognition portions 14 are formed over a range considered to have normal level.