Optical pickup

An optical pickup, comprising:

• a pickup housing, in which an optical part and a semiconductor laser are fixed, said pickup housing includes an inner periphery surface and an outer periphery surface in relation to an optical disc and is made of resin;
• an objective lens, which is attached within said pickup housing;
• and
• an objective lens driving mechanism, which is configured to drive said objective lens, further comprising:
• a metal-made bottom cover, which covers and holds down a lower surface of said pickup housing and has an extended and folded portion that extends into said inner periphery surface of said pick up housing, wherein said metal-made bottom cover and said semiconductor laser are thermally connected with each other,
• a magnet supporting metal member, which supports a magnet and is thermally connected to said metal-made bottom cover,
• a heat conductive grease that is placed between said metal-made bottom cover and said magnet supporting metal member, so as to connect them thermally, wherein
• the metal-made bottom cover is held down and extended into the inner periphery surface of the optical pickup housing and is elongated, further to an upper side, so as to bring the bottom cover to be close to the objective lens driving mechanism.