Chocolate Synthesizer is the fourth studio album by the Japanese rock band Boredoms.

[2] Early Japanese editions of the album were packaged with a coupon offering a free mail-order only 3-inch CD, titled Super Roots 2, only available to Japanese addresses.

Jon Wiederhorn of Rolling Stone gave the album 3 stars out of 5, saying, "Without question, the Boredoms are one of the most bizarre, adventurous bands on the planet, but for anyone who doesn't thrill to disjointed beats and cacophonous clatter, Chocolate Synthesizer may be a tough sweet to swallow.

"[10] Douglas Wolk of CMJ New Music Monthly called it "their most extraordinary and conceptually unified work to date.

"[11] In 2007, Rolling Stone Japan placed Chocolate Synthesizer at number 25 on its list of the "100 Greatest Japanese Rock Albums of All Time".