A terminal fitting made of an electrically conductive plate material, comprising: a main portion capable of at least partly receiving a tab of a mating terminal fitting; and a resiliently deformable resilient contact piece arranged at the main portion to be connected to the tab at least partly inserted into the main portion; wherein: the resilient contact piece includes a supporting portion for resilient deformation at the main portion; the main portion includes a base portion substantially facing the resilient contact piece in a resilient deforming direction of the resilient contact piece; the base portion includes a recess formed within the thickness range of the base portion; the supporting portion is in contact with the bottom surface of the recess; the resilient contact piece comprises a straight portion extending substantially horizontally forward from a portion of the main portion, the supporting portion connected to the front end of the straight portion and a resilient main body substantially extending obliquely inward toward the front from the supporting portion and inclined somewhat downward toward the front at its front end portion; characterised in that: the recess is formed in a range from a position substantially corresponding to an intermediate portion of the resilient main body to a position substantially corresponding to a rear end portion of the straight portion in forward and backward directions and in a range substantially over an entire width of a base portion of the main portion in width direction. a main portion capable of at least partly receiving a tab of a mating terminal fitting; and a resiliently deformable resilient contact piece arranged at the main portion to be connected to the tab at least partly inserted into the main portion; wherein: the resilient contact piece includes a supporting portion for resilient deformation at the main portion; the main portion includes a base portion substantially facing the resilient contact piece in a resilient deforming direction of the resilient contact piece; the base portion includes a recess formed within the thickness range of the base portion; the supporting portion is in contact with the bottom surface of the recess; the resilient contact piece comprises a straight portion extending substantially horizontally forward from a portion of the main portion, the supporting portion connected to the front end of the straight portion and a resilient main body substantially extending obliquely inward toward the front from the supporting portion and inclined somewhat downward toward the front at its front end portion; characterised in that: the recess is formed in a range from a position substantially corresponding to an intermediate portion of the resilient main body to a position substantially corresponding to a rear end portion of the straight portion in forward and backward directions and in a range substantially over an entire width of a base portion of the main portion in width direction. the resilient contact piece includes a supporting portion for resilient deformation at the main portion; the main portion includes a base portion substantially facing the resilient contact piece in a resilient deforming direction of the resilient contact piece; the base portion includes a recess formed within the thickness range of the base portion; the supporting portion is in contact with the bottom surface of the recess; the resilient contact piece comprises a straight portion extending substantially horizontally forward from a portion of the main portion, the supporting portion connected to the front end of the straight portion and a resilient main body substantially extending obliquely inward toward the front from the supporting portion and inclined somewhat downward toward the front at its front end portion; characterised in that: the recess is formed in a range from a position substantially corresponding to an intermediate portion of the resilient main body to a position substantially corresponding to a rear end portion of the straight portion in forward and backward directions and in a range substantially over an entire width of a base portion of the main portion in width direction. the recess is formed in a range from a position substantially corresponding to an intermediate portion of the resilient main body to a position substantially corresponding to a rear end portion of the straight portion in forward and backward directions and in a range substantially over an entire width of a base portion of the main portion in width direction.