An Argentinian MP has resigned his seat after being suspended for kissing a woman's breasts during an online parliamentary session.

Married father-of-three Juan Emilio Ameri shocked fellow lawmakers by letting a pretty blonde sit on his knee and appear to fondle him before bending down and kissing her right nipple after pulling down her black top.

Footage of the extraordinary moment led to the ruling Frente de Todos coalition in the north-west province of Salta expelling the 47-year-old pending an investigation and demanding his resignation as an MP.