In this paper the importance of the tertiarisation of the Galician agricultural sector and its main features in relation to the regional agricultural sector are analysed. It is a phenomenon that has received scarce attention in the literature, though it is a reality that deserves attention in order to favour the understanding of the agricultural and regional development. The distribution of service activities in the regional territory and the content of these activities are very relevant to hinder the abandonment of the rural space and to guarantee the internal cohesion of the territory. The study is based on the analysis of the available statistical data. In particular, the aggregated view comes from the Input-Output data and the Economic Accounts of Agriculture. A microanalysis of the phenomenon is carried out according to the Censo Agrario and the Encuesta de Estructura de las Explotaciones Agrarias. There is an increasing utilisation of services on behalf of the Galician agricultural sector along the 1990’s decade, later decreasing in more recent years. The analysis of the content of services allows to identify the importance of outsourcing of specific tasks and functions of the agricultural productive process, as well as the dynamism of certain knowledge-intensive business services, which are key for innovation processes in the agricultural sector.