This study examines the validity and reliability of a Turkish version of the State-Trait Anxiety Inventory Short Version. The sample consisted of 306 people between the ages of 18-59 who agreed to participate in the study and met the inclusion criteria. Data were collected with the demographic questionnaire, State-Trait Anxiety Inventory Short Version, State-Trait Anxiety Inventory and Brief Fear of Negative Evaluation Scale. All factor loadings of the State Anxiety Inventory Short Version were between 0.706 and 0.835, and those of the Trait Anxiety Inventory Short Version were between 0.694 and 0.810. The Cronbach alpha coefficients of the State and Trait Anxiety Inventory Short Version were calculated as 0.838 and 0.837, respectively. There was a significant difference between the first-test and retest values of the State Anxiety Inventory Short Version (p = 0.033) and no difference in the Trait Anxiety Inventory Short Version (p = 0.145). The Turkish-adapted State-Trait Anxiety Inventory Short Version is a valid and reliable measurement tool to determine the anxiety levels of individuals aged 18-59.