Muzejska zbirka Kastavštine kao dislocirana zbirka Pomorskog i povijesnog muzeja Hrvatskog primorja Rijeka djeluje od 1981. godine. Nastala je iz ideje i želje lokalne zajednice koja ju je dvadeset godina promišljala i stvarala. U ovom radu prikazana je njezina povijest od osnivanja do otvaranja za javnost, njezino djelovanje i važnost i za Kastavštinu, ali i šire. Naglasak je stavljen na proces obnove i stvaranja novog postava koji je dovršen u siječnju 2023. godine. Svaki muzej ima svoju prošlost koja prati osnivanje, razvoj, djelovanje i modernizaciju, što uvijek mora odgovarati potrebama vremena i društva. The Kastav Museum Collection, as a branch of the Rijeka Maritime and History Museum of the Croatian Littoral, has existed since 1981. It was born out of the idea and desire of the local community, who were envisaging and creating it for twenty years. This paper presents its history from its foundation to its opening to the public, along with its activities and significance both for the Kastav area and beyond. The emphasis is placed on the process of renovation of the building and the creation of a new permanent display, which was completed in January 2023. Each museum has its past that accompanies its establishment, development, operation, and modernization, which must always suit the needs of time and society.