This infobox shows the latest status before this currency was rendered obsolete.
The peso ley 18.188, usually known as either peso or, to distinguish it from the earlier peso moneda nacional, informally as peso ley, was the currency of Argentina between January 1, 1970 and May 5, 1983. It was subdivided into 100 centavos. Its symbol was $, sometimes $L. Its name comes from law 18188 which established it, effective April 5, 1969. Its ISO 4217 code was ARL.
In 1970 coins were introduced in denominations of 1, 5, 10, 20 and 50 centavos. As inflation eroded the currency's value, higher denominations were introduced: 1 peso in 1974, 5 and 10 pesos in 1976, and 50 and 100 pesos in 1978.