BACKGROUND: The emergence of the new severe acute respiratory syndrome coronavirus 2, which causes COVID-19 disease, has been a major public health challenge and an increase in the feeling of uncertainty of the population, who is also experiencing an increase in levels of anxiety and fear regarding the COVID-19 disease. OBJECTIVE: The objective of the study was the construct and criterion validation of the (AMICO, for its acronym in Spanish) to measure both constructs in the general Spanish population. METHODS: Descriptive study of psychometric validation. A field study was carried out to execute univariate and bivariate analyses, in addition to the exploratory and confirmatory factorial analysis of the scale. For the criteria validity study, the () and sensitivity and specificity values were calculated. RESULTS: The study sample was composed of 1036 subjects over 18 years of age, who resided in Spain, where 56.3% were women with a mean age of 48.11 years (SD = 15.13). The study of construct validity reported two factors and 16 items, with a Cronbach's alpha value of 0.92. The scale was concurrently valid with the used gold standard and obtained sensitivity values of 90.48% and specificity values of 76%. CONCLUSIONS: The AMICO scale is valid and reliable for assessing the level of anxiety and fear of COVID-19 in the adult Spanish population and is highly sensitive.