This doctoral thesis entitled Senior citizens, communication technology and socialization originates from the interest of the nowadays changes occurring by the process of human aging. In Brazil it started about 50 years ago, but in contrast with developed countries, these changes occurred in such a high speed that it was difficult to implement public policies, as well as their recognition and the social adjustment of the entire population. The growing of seniors segment and the decrease in birthrate changed the population structure and naturally modified their social interactions. Concurrently to this, the evolution of digital technology has impacted the daily lives of people with continuous innovations and changes in communication interfaces. If communication in postmodern times occurs largely through technological objects (mobile phones, smartphones, desktops, notebooks, tablets, etc.) and digital media (software, applications, websites, social networks, etc.), all population ages must interact with these technologies in order to participate in social and information exchanges within their social environment. Human aging has some characteristics that lead to natural losses such as physical, cognitive and social ones. The elderly social network decrease, the difficulties of its renewal and the adaptation to social environment changes are some of consequences of losses. Thus it was believed that there was a difficulty in the elderly follow the technological evolution of communication objects in order to interfere with maintaining and increasing their social relationships. This research aimed to survey the use of technological communication objects by the segment of the elderly and answer whether this use has something to do with their socialization. For this, a literature review on the Brazilian population aging, the relationship of the elderly with technological objects, and the concepts related to the postmodern socialization were raised and analyzed; also semi-structured interviews with the elderly was conducted, in order to obtain a qualitative understanding of the target audience about the use of communication technologies, and a questionnaire online was applied to quantify this use. These techniques were used to identify the frequency of use of technological objects and communication media, to verify the activities undertaken and the social groups associated to them and to compare the behavior of the three groups of elderly (60-69, 70-79 and above 80) with the younger group. The results showed a direct relationship between the use of technology and the way of socialization held today and it was noticed behavioral differences between the age groups of older people and a close proximity of group of 60-69 years with the younger group. This work contributes to a deeper understanding of the behavioral profile of the Brazilian elderly that, unlike the common sense, does not only characterize the picture of losses and hopelessness that is often portrayed. Today the elderly are healthier, more engaged, more productive and seek to be inserted not only among the older people, but in all social groups.