A protector includes: a main body part including an accommodation part which accommodates an electric wire bundle; a cover part which is attached to the main body part and covers the accommodation part; and a clamp which is formed on the main body part and is inserted into a locking hole formed in a mounting target part to lock the mounting target part. The protector further includes a pressing piece which is formed on a side of the main body part opposite to the clamp, extends along a plane perpendicular to an axis of the clamp, and is disposed at a position laterally deviating from the axis of the clamp.