Connector having a slider holder

A connector comprising:

• a housing;
• and
• a slide holder,
• wherein the housing includes a lock portion maintaining a completely fitted state with a mating housing,
• wherein the slide holder is configured to be mounted on the housing so as to be movable in a fitting direction of the housing and the mating housing between a temporary locking position and a main locking position, and is movable from the temporary locking position to the main locking position while avoiding interference with the lock portion only in the completely fitted state,
• wherein the housing includes a pair of protective walls extending in the fitting direction so as to sandwich the lock portion and the slide holder in a width direction orthogonal to the fitting direction, and
• wherein the protective wall includes a notch which makes a part of the slide holder visible when the slide holder is in the temporary locking position, and makes the part of the slide holder invisible when the slide holder is in the main locking position when viewed from the width direction.