Introduction. Analysis of the published data indicates that further research to establish the taxonomic composition of tumbling flower beetles of the fauna of Ukraine is needed. The ecology of tumbling flower beetles including species that are part of the fauna of Ukraine has been little studied. The host plants of tumbling flower beetle larvae are the least known. The data on the distribution of tumbling flower beetles in Ukraine remain fragmentary. Aim. The aim of the work is to analyze the distribution and trophic relationships of 23 species of tumbling flower beetles that were revealed during ecological and faunistic studies on the territory of Ukraine in the period 2015–2021. Methods. Generally accepted research methods were used during the study. The observations of the feeding of tumbling flower beetles were carried out under natural conditions. Host plants of tumbling flower beetle larvae were revealed by examining herbaceous plants and dead wood during the beginning of the flight period of adults. Main results. During ecological and faunistic studies 23 species of tumbling flower beetles were identified, of which 9 species were recorded for the first time in the Chernigov region, two species – in the Odesa one. The presence of Mordellistena episternalis Mulsant, 1856 and M. secreta Horák, 1983 in the fauna of Ukraine was confirmed. Host plants for imago are presented for 16 anthophilic species. Trophic relationships of chortobiont species at the larval stage with herbaceous plants of 8 species, which belong to 5 families, have been identified. The host plant (Jacobaea vulgaris Gaertn.) of the larvae of Mordellistena pseudopumila Ermisch, 1963 was indicated for the first time. The development of xylophilous species in the wood of three plant species was recorded. The results obtained are augmented with data from literature sources. Conclusions. Thus, the data obtained clarify the taxonomic composition and distribution of tumbling flower beetles of the fauna of Ukraine. They include new data on the feeding of adults and larvae of tumbling flower beetles and can be used to develop measures for rational environmental management and conservation of biological diversity in Ukraine. Control of the development of the larvae of Mordellistena parvula (Gyllenhal, 1827) on wild plants can reduce the number of the said sunflower pest.