This study is concerned with appropriation of space and the social processes that explain the attachment between people and places (Vidal, Pol, Guàrdia and Peró, 2004). In this paper we show some results of a study focused on the relation between “place attachment” and “place identity”. Several scholars have pointed out, in different ways, the links between both issues. We agree with Hidalgo, Hernández, Salazar and Hess (2007) in considering that place attachment is an affective bond, and place identity is a component of personal identity. Mainly, we want to know in which ways residential mobility has an effect upon both processes. Considering that people live in several cities across their lives, and people ”live” in several places at the same time. The main objective of this research is to know to what extent the patterns of residential mobility of people affect place attachment and place identity. At same time, we want to know how people attach to places compared to place identity processes. With regard to place, is attachment developed in the same way that identity does? Are place attachment and identity two aspects from a more general issue? In order to explore and specify these relationships we applied a questionnaire with scales on identity and attachment to a sample of graduate students in Barcelona. To explore these relationships we attended to three spatial levels: neighbourhood, city and region. We analysed that to some extent place attachment and place identity have different values in each kind of space, related to the time of residence and residential mobility of the people surveyed. The main results of the study contribute to the knowledge on the social construction of identity and place attachment. We conclude considering the way in which residential mobility is related to the meanings of place and place attachment. This issue is similar to what Gustafson (2001) called the relationship between place attachment and mobility by means of “roots” and “routes”, as well as it relates to the ways of appropriation explained by Moles and Rohmer (1964).