The main streets and the city entrances of Surabaya support its economic activity as well as become a potential to generate 'first impression' or image of the city for its users. In line with the city government's program, the existence of the green line in the corridor of the main streets should be remarked to develop green space. Consequently,  visual objects on the green line, such as vegetation, need to meet the rules of the visual aesthetic arrangement based on the characteristics of the corridor  and visual capabilities of observers. Jalan Mastrip is  one of the main streets, which is crucial for the city economy and also becomes a city entrance of Surabaya. It has  potential to give a positive ‘first impression‘ for its users. However, the street condition is still beyond  expectation as a city entrance. Therefore, the aim of this study is to formulate the concept of arrangement of green line  in accordance with the characteristics of corridor space and visual capabilities of observers. Descriptive-qualitative method is used supported by the perception of observers / respondents. Then the observations and evaluation results were analyzed to get the arrangement concept of green line of Mastrip corridor, accordance with its characteristics as Surabaya entrance corridor with industry, trade and services concept.