To provide a blister package which stores an article firmly to prevent it from slipping off, allows the article to be put in and out repeatedly, and offers a high degree of freedom in designing the package.

The blister package is composed of a mount 10 and a blister cover 1 having a hollow 1a storing the article, wherein a locking flap 2 is provided at least at one place on either of the mount or the blister cover and a nail piece 3 having a front end directed to the base of the locking flap is provided close to the free end of the locking flap and a projection 4 having a protrusive shape in the hollow forming direction is formed at the nail piece or a part on the locking flap that is closer to the free end than the nail piece and also a slit 11 in which the free end of the locking flap is inserted to lock the nail piece is formed on the other side.

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