NOVELTY - A silicon (7) refining apparatus (100) consists of pressure reduction container (1), crucible (2) having silicon injection opening portion (2a) positioned in pressure reduction container, heating apparatus (3) for heating silicon raw material(S) in crucible, lid (L1) (4) having through-hole portion (41) having small opening (41a) area than the silicon injection opening portion, and lid (L2) (5) having bigger projection surface than through-hole portion. The lid (L1) is provided in the position which covers the silicon injection opening portion.    USE - Silicon refining apparatus is used for obtaining silicon raw material for solar cells.    ADVANTAGE - The silicon refining apparatus economically refines silicon without reducing silicon refinement ability.    DETAILED DESCRIPTION - A silicon refining apparatus consists of pressure reduction container, crucible having silicon injection opening portion positioned in pressure reduction container, heating apparatus for heating silicon raw material(S) in crucible, lid (L1) having through-hole portion having small opening area than the silicon injection opening portion, and lid (L2) having bigger projection surface than through-hole portion. The lid (L1) is provided in the position which covers the silicon injection opening portion. The lid (L2) is provided such that the opening of the through-hole portion is exposed and covers the opening of the through-hole portion. An INDEPENDENT CLAIM is included for method for refining silicon, which involves melting silicon raw material in the crucible, reducing the pressure of pressure reduction container, maintaining melted silicon in pressure reduction state, taking out the melted silicon from the crucible, and melting the through-hole portion, inside of the crucible, or at least one portion of deposit (8) adhered to the surface of the lid (L1) which opposes crucible.    DESCRIPTION OF DRAWING(S) - The drawing shows sectional view of silicon refining apparatus.    Pressure reduction container (1)    Crucible (2)    Silicon injection opening portion (2a)    Heating apparatus (3)    Lids (4,5)    Silicon (7)    Deposit (8)    Through-hole portion (41)    Opening (41a)    Silicon refining apparatus (100)