The high rate of injury incidence and its severity is estimated to cause approximately 9% of global mortality, while a large proportion of people surviving their injuries experience temporary or permanent disabilities. To reduce the occurrence of disability and improve general health of survivors, a more comprehensive rehabilitation approach is needed. Motor imagery is recognized as the promising cognitive strategy to counteract impaired functional capacity of the neuromuscular system. Thus, we aimed to provide to the Slovenian-speaking community a valid and reliable version of Motor Imagery Questionnaire - 3 MIQ-3, that consists of kinaesthetic imagery KI and visual i.e., Internal Imagery IMI and external imagery EVI items. We investigated both absolute and relative test-retest repeatability; construct validity and internal consistency of the KI, IMI and EMI items of the Slovenian version of MIQ-3 in 86 healthy adult subjects. Results showed high to very high average intra-class correlation coefficient ICC for the visual items ICC=0.89 and KI items ICC=0.92, whilst the measure of absolute variability presented as coefficient of variation CV% ranged from 4.9% EVI to 6.7% KI. The internal consistency was satisfactory Cronbach α=0.91 KI and 0.89) for both visual items. Confirmatory analysis confirmed a two-factorial structure of MIQ-3. Understanding the content of the questionnaire is of utmost importance to ensure its effectiveness in rehabilitation practice. The Slovenian translation of the MIQ-3 is culturally and linguistically equivalent to the original English version.