Abstract: A memory card adapter includes a cover, a base, a connecting apparatus and a flexible strip. An inserting groove is formed between the cover and the base. Two retaining walls are arranged in two sides of the base. An opening is opened in the retaining wall and connects the inserting groove. The connecting apparatus is fixed in the rear of the base. The flexible strip includes a main part showing a strip shape, an extending end formed in the front end of the main part and against the outside of the retaining wall, and a bending portion formed between the main part and the extending end and protruding into the inserting groove from the opening of the retaining wall. The flexible strip can fasten a Micro SD card in the memory card adapter firmly, while the Micro SD card is inserted.