A fixing structure for a connector, comprising: a housing, having a plurality of terminal accommodating chambers configured to respectively accommodate one of a plurality of female terminals; and a rear holder, for fixing the housing inserted into an opening formed in a casing in which an electronic device is accomodated by a plurality of screw, wherein the housing is formed with a plurality of first openings for insertion of mating terminals and a plurality of second openings for leading out conductive parts of the female terminals respectively, and, the rear holder has a plurality of second through holes (31, 32) through which the screws are inserted respectively, wherein the housing has a projection contactable with an edge portion of the opening of the casing and projected from an end face on which the second openings are formed, the rear holder has a base plate opposing the casing in a state where the projection is disposed therebetween, a plurality of first through holes formed on the base plate and corresponding to the second openings, a plurality of terminal holding members respectively provided at one of the first through holes and configured to come in contact with a female terminal respectively, and the second through holes (31, 32) are arranged so as to deviate to one side with respect to a center of gravity of a region in which the first through holes are formed, characterized in that the elastic force of one of the terminal holding members which is disposed at a first position facing at least one of the second through holes (31, 32) in a peripheral part of the region is smaller than the elastic force of another one of the terminal holding members which is disposed at a position except for the first position. a housing, having a plurality of terminal accommodating chambers configured to respectively accommodate one of a plurality of female terminals; and a rear holder, for fixing the housing inserted into an opening formed in a casing in which an electronic device is accomodated by a plurality of screw, wherein the housing is formed with a plurality of first openings for insertion of mating terminals and a plurality of second openings for leading out conductive parts of the female terminals respectively, and, the rear holder has a plurality of second through holes (31, 32) through which the screws are inserted respectively, wherein the housing has a projection contactable with an edge portion of the opening of the casing and projected from an end face on which the second openings are formed, the rear holder has a base plate opposing the casing in a state where the projection is disposed therebetween, a plurality of first through holes formed on the base plate and corresponding to the second openings, a plurality of terminal holding members respectively provided at one of the first through holes and configured to come in contact with a female terminal respectively, and the second through holes (31, 32) are arranged so as to deviate to one side with respect to a center of gravity of a region in which the first through holes are formed, characterized in that the elastic force of one of the terminal holding members which is disposed at a first position facing at least one of the second through holes (31, 32) in a peripheral part of the region is smaller than the elastic force of another one of the terminal holding members which is disposed at a position except for the first position.