Job crafting presents a set of proactive behaviours in which employees may engage to alter the job content or their relations with others at work. In recent years, several measures have been developed to capture job crafting. In the present study, we test the validity and reliability of an existing Job Crafting Questionnaire (the JCRQ) in four studies: first, we test the scale validity of the JCRQ in a Spanish diary study (Spain, N = 164, diary occasions 820). Second, we test the scale validity across two Western (Spain, N = 164 and UK, N = 109) and two Eastern cultures (China, N = 170 and Taiwan, N = 165). Third, we test the test-retest reliability in a Spanish three-wave longitudinal sample (N = 191). Finally, we test the criterion validity using data from the four countries. Results confirm the presence of five independent job crafting dimensions: increasing challenging demands, decreasing social job demands, increasing social job resources, increasing quantitative demands and decreasing hindrance job demands. The JCRQ shows acceptable test-retest reliability, scale and criterion validity across the four studies.ARTICLE HISTORY