Caring thinking as a higher order thinking type has both cognitive and affective components, as Lipman stated. Attributed as thinking depending on affects, emotion, the heart, beliefs, it is associated with the processes of Krathwohl's affective domain taxonomy. In this study, therefore, it was aimed to develop an inventory of caring thinking skills towards middle school students, which was designed by and grounded on Krathwohl's taxonomy. For the inventory, the processes of sequential exploratory mixed design were employed in this study. The caring thinking skills inventory accounts for 20 problem scenarios, which have 5 options, and 100 items. The lowest point is 20, and the highest point is 100. Giving an answer is quite easy. The degree to what students think caringly can be measured using an answer key which rating of items ranging from 1 to 5 in each scenario. The inventory designed and developed to understand if caring thinking is a measurable and improvable skill and whether it is valid and reliable data collection instrument as a result of respectively, qualitative and quantitative studies performed. It is recommended that the inventory should be used in measuring students' affective behaviors, dispositions, and skills toward real world experiences.