In　this　paper,　we　present　a　fully　printed　accelerometer　with　a　piezoresistive　carbon　paste-based　strain　gauge　printed　on　its　surface,　which　can　be　manufactured　at　low　cost　and　with　high　efficiency.　This　accelerometer　is　composed　of　two　parts:　a　sensor　substrate　made　from　high-temperature　resin,　which　is　printed　by　a　3D　printer　based　on　stereolithography　apparatus　(SLA),　and　a　carbon　paste-based　strain　gauge　fabricated　by　screen-printing　technology　and　by　direct　ink　writing　(DIW)　technology　for　the　purposes　of　comparison　and　optimization.　First,　the　structural　design,　theoretical　analysis,　simulation　analysis　of　the　accelerometer,　and　analyses　of　the　conductive　mechanism　and　the　piezoresistive　mechanism　of　the　carbon　paste-based　strain　gauge　were　carried　out.　Then　the　proposed　accelerometer　was　fabricated　by　a　combination　of　different　printing　technologies　and　the　curing　conditions　of　the　carbon　paste　were　investigated.　After　that,　the　accelerometers　with　the　screen-printed　strain　gauge　and　DIW　strain　gauge　were　characterized.　The　results　show　that　the　printing　precision　of　the　screen-printing　process　on　the　sensor　substrate　is　higher　than　the　DIW　process,　and　both　accelerometers　can　perform　acceleration　measurement.　Also,　this　kind　of　accelerometer　can　be　used　in　the　field　of　measuring　body　motion.　All　these　findings　prove　that　3D　printing　technology　is　a　significant　method　for　sensor　fabrication　and　verification.　©　2020　by　the　authors.　Licensee　MDPI,　Basel,　Switzerland.