The Conference of the Polish Society of Andrology – 18th Day of Andrology took place on September 30th – October 1st, 2016 in the Hotel Novotel Marina in Gdansk. The event was organized by the Conference Office from the Karol Marcinkowski Medical University in Poznan in cooperation with the Local Organizing Committee chaired by Dr. Mariusz Łukaszuk and the Scientific Committee chaired by Prof. Jolanta Słowikowska‑Hilczer. The Conference was preceded by a workshop entitled: “The criteria for the legitimacy of sexological intervention: between norm and pathology” conducted by Dr. Robert Kowalczyk, head of the Department of Sexology at the Faculty of Psychology and Human Sciences of the Andrzej Frycz Modrzewski Academy in Cracow. The Conference was started by the greeting delivered by the Polish Society of Andrology President Prof. Jolanta Słowikowska‑Hilczer. Prof. Ewa Rajpert‑DeMeyts from the Department of Growth and Reproduction, Copenhagen University Hospital (Rigshospitalet) in Denmark was awarded a statuette and a diploma of the Polish Society of Andrology Honorary Member. Dr. Marta Olszewska from the Department of Reproductive Biology and Stem Cells, Institute of Human Genetics, Polish Academy of Sciences in Poznan, was awarded the Polish Society of Andrology Prize of Young Scientists named by Prof. Michał Bokiniec. Due to the fact that the winner could not attend the Conference, she presented her work through the Skype. Dr. hab. Renata Walczak‑Jędrzejowska announced the completion of work by Polish Society of Andrology and the National Chamber of Laboratory Diagnosticians on Polish Recommendations: “The basic semen analysis according to the standards of the World Health Organization in 2010”. Prof. Jolanta Słowikowska‑Hilczer presented medical doctors, who in 2016 received the title of clinical andrologist from the European Academy of Andrology (EAA). She announced also publication of the Polish version of the European Association of Urology (EAU) recommendations on male hypogonadism and male sexual dysfunction in the journal “Advances in Andrology Online”. Prof. Piotr Jedrzejczak introduced the rules of the Polish Society of Andrology Certificate of clinical andrology. Prof. Malgorzata Piasecka discussed the current situation of the journal “Advances in Andrology Online”. Apart from the Polish lecturers the scientific part of the Conference was honored with the presence of foreign guests: Prof. Ewa Rajpert‑DeMeyts from Denmark, Prof. Gerhard van der Horst and Prof. Stefan Du Plessiss from South Africa, Prof. Aleksander Giwercman from Sweden, Prof. Frederick Wu and Dr. Gulam Bahadur from the United Kingdom. The topics of the Conference included problems of male infertility, urological and endocrinological issues important in andrology, as well as achievements in the basic research on physiology and pathology of the male reproductive system. The results of current andrological research were presented in the form of short oral presentations. The meeting ended with the invitation to the Polish Society of Andrology Conference – 19th Day of Andrology in 2017 in Krakow given by Dr. hab. Małgorzata Kotula‑Balak and Dr. Leszek Bergier.