The invention relates to a shaver. The shaver can be put away and has the advantages of being convenient to carry and simple and easy to use. The shaver is convenient to carry due to the facts that ashaver head, a functional supporting cover, a lower cover, a sliding cover device, a rotary joint, a knife grinder and an internal spring structure are arranged, and a sliding groove is formed; the shaver is small in size and convenient to carry and travel; the inner spring structure enables the shaver head to be pressed under the functional supporting cover so that the troubles that the shaver does not have a cover and is prone to get rusty can be eliminated, and inconvenience to people in daily life can be eliminated on the condition that the space is not occupied; and the sliding cover device and the rotary joint can also enable the shaver to be more easy to carry, and the troubles can be avoided. The shaver is simple and easy to use due to the facts that the inner spring structure supports the shaver head, and when the functional supporting cover slides downwards, the inner spring structure ejects the shaver head to be automatically popped out; the functional supporting cover consists of a cover body and the knife grinder, and when the shaver head is popped out, the knife grinder can grind the knife surface so that the shaver head can be sharp; a groove is formed in the lower part of the shaver head, when the shaver head is popped out, the functional supporting cover can be embedded into the groove so that the shaver head can be stable and firm, and use can be smoothly; andthe shaver head can be put away when not being used so that convenience can be brought to users.