Three-dimensional printing device and liquid tank

The invention provides a liquid tank which is suitable for a three-dimensional printing device. The liquid tank comprises a tank body, one or more release films and one or more identification parts. The tank body is used for holding photosensitive resin and provided with a transparent bottom. The release films are located in the tank body, and attached to the transparent bottom. The identificationparts are arranged on the release films. A reader of the three-dimensional printing device reads the identification parts to obtain the usage record of the release films. The invention further provides the three-dimensional printing device. 本发明提供种液槽适用于三维打印装置。液槽包括槽体、至少离型薄膜以及至少辨识部。槽体用以盛放光敏树脂，且具有透光底部。所述离型薄膜位于所述槽体内，且贴附所述透光底部。所述辨识部设置于所述离型薄膜。所述三维打印装置的读取器读取所述辨识部，以取得所述离型薄膜的使用纪录。另提供种三维打印装置。