The development of Internet and the access of consumers to social media influence their online engagement. This also reflects on how consumers write online opinions about brands and products. This survey objective was to research the influence of the perceived risk and brand trust on the consumers’ engagement with electronic word-of-mouth. Moreover, the authors investigate the role of brand trust as a mediator in the relationship between the perceived risk and eWOM. The structural equation modelling (SEM) was used to analyse data from 319 Polish consumers. The results indicated a negative influence of the perceived risk on consumes’ brand trust. A positive influence was detected from the perceived risk and brand trust on the consumers’ engagement with eWOM. Finally, brand trust was detected to negatively partially mediate the relationship of the perceived risk and eWOM