The Cord Room is a room near the start of the Violet Area of the game Ib. It can be accessed after Garry gets separated from Ib and Mary by moving the right bookshelf in the first Doll Room.
When entering the room, there are some wall writings straight ahead, with a Save Point to the left. There is a red rose in the bottom right corner, which switches control over to Ib when Garry stands on it. A triangular hole in the floor is found nearby. There are five cords in the top right of the room.
Each cord has a different effect. Pulling the leftmost cord causes a Claw to emerge from the wall and attack Garry, causing him to lose one petal from his rose. Pulling the cord the second from the left causes Garry to get attacked by Gas, causing him to lose two petals from his rose. Pulling the central cord will cause the room to become pitch black, causing Garry to become shocked and pull the cord again. Pull the cord the second from the right causes Bashful Glance to move over a hole in the Brown Area, allowing Ib and Mary to cross. Pulling the rightmost cord causes either a Blue Doll or a Mannequin Head to fall down, increasing Garry's Doom Counter by one.
When Ib crosses the gap using Bashful Glance, she can push a triangular box down the hole. It lands in the cord room, allowing Garry to push it into the hole, opening the door and allowing him to progress.
It's possible to see Red Eyes peeking over the wall at Garry when entering the room.