The invention discloses a safety balcony. The safety balcony comprises a balcony floor, a glass guardrail enclosing the balcony floor and an embedding part arranged on the balcony floor. The glass guardrail is spliced by a plurality of guardrail modules. Each guardrail module comprises bases, a glass block, two opposite lateral standing columns for mounting the glass block and a transverse rod, wherein the transverse rod is detachably connected to the ends of the lateral standing columns; two lateral portions of the lateral standing columns extend outwardly to form a fixing protruding part and a locking protruding part, the locking protruding part is provided with a locking groove for limiting the glass block, and the fixing protruding part is provided with an open fixing groove. Each guardrail module further comprises a fastening part which can be matched with the fixing groove to fix the glass block. The fastening part comprises a through groove which is formed in the middle of the fastening part and allows the glass block to penetrate and a clamping part which is formed by the peripheral wall, extending outwardly, of the fastening part. The safety balcony has the advantages that the safety balcony is stable in structure, simple to assemble, less prone to damage and high in stability, and the glass blocks can be mounted after the bases and the lateral standing columns are mounted.