Ventouris started his football career, when at the age of 12 signed a sports card at Fostiras, where in 1958 was promoted to the men's team.

[1] In the summer of 1965, AEK Athens acquired him as part of the renewal of the club's roster that they were attempting, having spent the particularly important for the time amount of 435,000 drachmas.

[6] In his 7 appearances for the European Cup he scored 3 times including a brace in the 3–2 away defeat against Jeunesse Esch on 2 October 1968,[7] where they eventually reached the quarter-finals of the tournament[8] and once against Internazionale at home, equalizing the game before the final 3–2 win on 29 September 1972.

[13] On 14 April 1963, he played at a friendly match was held in Lisbon for Greece U21 against Portugal, but it proved to be a men's team, as players of 25 and 26 years old were competing.

He died on 10 June 2002, at the age of only 59, from heart attack and after suffering in his last years from health problems with rheumatoid arthritis.