Parks are important and considerable spaces in social life of citizens. This writing searches about the entering of these spaces in the structure of Iranian cities, in direction of difference between Park and Garden as known concept in Iranian culture. With this approach, transition of term" Park" is explored from just a new concept in Gajar age to defined physical space in Pahlavi II. Because of not needing to spaces as park in traditional structure of Iranian cities, this research detects parks as social areas just are considered in 40th decade A.H. Besides, modern architecture is affected contemporary landscape designers of Iran.