The female electrical terminal has a cylindrical portion able to receive a male electrical terminal inserted from front to rear, and a left wall portion arranged so that a portion of the cylindrical portion runs along the outer surface of the male electrical terminal. The left wall portion has a left plate spring portion having a contact point pressing against the outer wall of the male electrical terminal and extending forward from the rear, and a slit surrounding the outer edge of the left plate spring portion to separate the other section of the left wall portion from the outer edge of the left plate spring portion. The other section of the left wall portion has a left protruding portion positioned forward relative to the tip of the left plate spring portion and bulging inwardly into the cylindrical portion. The left protruding portion is positioned at least on the edge of the slit.