According to the existing legal framework, Department is the basic academic unit which covers the discipline of a science and grants a single degree that may have orientations or specializations. Faculties corresponding to relative sciences comprise a School. The Department of Biology, together with the Faculties of Physics, Chemistry, Mathematics, Geology & Geoenvironment and the Department of Informatics & Telecommunications establish the School of Science.

Like all Faculties of the Greek Higher Education Institutions, the Department of Biology is administered by: the Department Council, the Department Board, the Department Chairman and the Deputy Chairman, who replaces the Chairman when he is absent, unavailable or lacking.

The Department Council consists of Academic/Teaching & Research Staff, student representatives equal to 50% and postgraduate student representatives equal to 15% of the Teaching & Research Staff who are members of the Department Council.

In the Department Council also participate representatives of the Special Laboratory Teaching Staff, the Special Technical Laboratory Staff as well as non-doctoral Assistants, Scientists and Curators when members of the respective categories of personnel holding permanent posts in the Department . Each of these three categories of personnel participates in the Department Council with representatives equal to 5% of the Teaching & Research Staff who are members of the Department Council.

The Department Council: a) decides on issues such as Cources, Studies Regulations and the award of scholarships to graduate students, b) validates the decisions of the Department s (teaching assignments, textbooks, etc.) and the Department Board (funds allocation), c) proclaims academic posts and elects new Department Members.

The Department Board consists of the Department Chairman and the Deputy Chairman, the Heads of Department s, two (2) undergraduates and one (1) graduate student representatives, as well as a representative of the Special Technical Laboratory Staff or non-doctoral Assistants, Scientists and Curators (when discussing issues that affect them).

The Department Chairman: a) convenes the Department Council, and the Department Board, b) prepares their agenda and chairs them, c) proposes to the Department Council for various areas of its responsibility, d) ensures the implementation of the Department Council's and Department Board's decisions, e) establishes Committees for studying and forwarding specific issues and f) supervises the administartion of the Faculty.