螺钿，又称螺甸、螺填、钿嵌，是一种在漆器或木器上镶嵌贝壳或螺蛳壳的装饰工艺，也用于金属和其他表面的装饰。

螺钿一般可分为厚螺钿（硬螺钿）和薄螺钿（软螺钿）两类。

螺钿常与莳绘（一种用金银粉在漆器上贴出图案和花纹的漆艺）结合装饰漆器。螺钿与金银薄片共用的技法叫做平脱，是莳绘的前身，但莳绘工艺比平脱更为先进，制作出的纹饰更为美观。

螺钿片所用的材料主要包括鲍鱼壳、青色珍珠蚌、夜光蝾螺、白蝶贝、珠母贝、琥珀、玳瑁等，有时也在贝壳上雕刻花纹。

Raden(螺鈿), also known as "Japaning" in the UK, is a Japanese decorative craft used in the creation of lacquerware and woodwork, though it can be applied to metal and other surfaces. The basic underpinnings of raden consist of variously applying the cut linings of mother-of-pearl, abalone, ivory, and other shells into the surface of the target lacquer or wood.