An electrical connector includes a housing and a plurality of terminals disposed in the housing. The housing includes a bottom wall and a protruding wall. The terminal includes a held portion for being held in the housing, a base portion, a transition portion, an elastic arm portion and a contact portion. The protruding wall includes a plurality of vertical wall portions and a displacement receiving recess. The housing has an opening penetrating the bottom wall at least at a lower side of the displacement receiving recess. The displacement receiving recess communicates with the opening. Further, the base portion and the transition portion of the terminal are situated outside of the displacement receiving recess.