Based on the reading of preserved fragments, the author deals with the question whether Lucilius wrote verses belonging to the genre of satire. According to the quantity of fragments (approximately 1,300) and the rare preservation of complete verses, the author suggests dividing the fragments into several groups. The author tried to find a literary criterion which takes into account the features typical of the genre of satire and is also understandable to contemporary readers. The presence of criticism has been chosen as such a criterion which, in the author's opinion, has been found along with satire from its beginnings to the present. It is one of the most typical features of satire. In the second part of the paper, the author presents a group of chosen satirical fragments which is divided according to the focus of the criticism.