Junction box having block type structure

A junction box having a block type structure is provided. The junction box having a block type structure includes: a lower cover of a quadrangular shape in which an inner groove having an opened upper part is formed and at one side of which a sliding groove is formed; a main body at one side of which a flat plate having a step surface is coupled to the sliding groove of the lower cover by downwardly sliding and in an upper part of which a plurality of block grooves are formed; a block assembly being received and assembled in the block grooves of the main body; and an upper cover coupled to the main body by wrapping an upper part of the main body so as to protect the block assembly.